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<h1 id="themes"><a class="header" href="#themes">Themes</a></h1>
<p>To use a theme add <code>theme = "<name>"</code> to the top of your <a href="./configuration.html"><code>config.toml</code></a> file, or select it during runtime using <code>:theme <name></code>.</p>
<h2 id="creating-a-theme"><a class="header" href="#creating-a-theme">Creating a theme</a></h2>
<p>Create a file with the name of your theme as the file name (i.e <code>mytheme.toml</code>) and place it in your <code>themes</code> directory (i.e <code>~/.config/helix/themes</code> or <code>%AppData%\helix\themes</code> on Windows). The directory might have to be created beforehand.</p>
<blockquote>
<p>💡 The names "default" and "base16_default" are reserved for built-in themes
and cannot be overridden by user-defined themes.</p>
</blockquote>
<h3 id="overview"><a class="header" href="#overview">Overview</a></h3>
<p>Each line in the theme file is specified as below:</p>
<pre><code class="language-toml">key = { fg = "#ffffff", bg = "#000000", underline = { color = "#ff0000", style = "curl"}, modifiers = ["bold", "italic"] }
</code></pre>
<p>Where <code>key</code> represents what you want to style, <code>fg</code> specifies the foreground color, <code>bg</code> the background color, <code>underline</code> the underline <code>style</code>/<code>color</code>, and <code>modifiers</code> is a list of style modifiers. <code>bg</code>, <code>underline</code> and <code>modifiers</code> can be omitted to defer to the defaults.</p>
<p>To specify only the foreground color:</p>
<pre><code class="language-toml">key = "#ffffff"
</code></pre>
<p>If the key contains a dot <code>'.'</code>, it must be quoted to prevent it being parsed as a <a href="https://toml.io/en/v1.0.0#keys">dotted key</a>.</p>
<pre><code class="language-toml">"key.key" = "#ffffff"
</code></pre>
<p>For inspiration, you can find the default <code>theme.toml</code>
<a href="https://github.com/helix-editor/helix/blob/master/theme.toml">here</a> and
user-submitted themes
<a href="https://github.com/helix-editor/helix/blob/master/runtime/themes">here</a>.</p>
<h3 id="using-the-linter"><a class="header" href="#using-the-linter">Using the linter</a></h3>
<p>Use the supplied linting tool to check for errors and missing scopes:</p>
<pre><code class="language-sh">cargo xtask themelint onedark # replace onedark with <name>
</code></pre>
<h2 id="the-details-of-theme-creation"><a class="header" href="#the-details-of-theme-creation">The details of theme creation</a></h2>
<h3 id="color-palettes"><a class="header" href="#color-palettes">Color palettes</a></h3>
<p>It's recommended to define a palette of named colors, and refer to them in the
configuration values in your theme. To do this, add a table called
<code>palette</code> to your theme file:</p>
<pre><code class="language-toml">"ui.background" = "white"
"ui.text" = "black"
[palette]
white = "#ffffff"
black = "#000000"
</code></pre>
<p>Keep in mind that the <code>[palette]</code> table includes all keys after its header,
so it should be defined after the normal theme options.</p>
<p>The default palette uses the terminal's default 16 colors, and the colors names
are listed below. The <code>[palette]</code> section in the config file takes precedence
over it and is merged into the default palette.</p>
<div class="table-wrapper"><table><thead><tr><th>Color Name</th></tr></thead><tbody>
<tr><td><code>default</code></td></tr>
<tr><td><code>black</code></td></tr>
<tr><td><code>red</code></td></tr>
<tr><td><code>green</code></td></tr>
<tr><td><code>yellow</code></td></tr>
<tr><td><code>blue</code></td></tr>
<tr><td><code>magenta</code></td></tr>
<tr><td><code>cyan</code></td></tr>
<tr><td><code>gray</code></td></tr>
<tr><td><code>light-red</code></td></tr>
<tr><td><code>light-green</code></td></tr>
<tr><td><code>light-yellow</code></td></tr>
<tr><td><code>light-blue</code></td></tr>
<tr><td><code>light-magenta</code></td></tr>
<tr><td><code>light-cyan</code></td></tr>
<tr><td><code>light-gray</code></td></tr>
<tr><td><code>white</code></td></tr>
</tbody></table>
</div>
<h3 id="modifiers"><a class="header" href="#modifiers">Modifiers</a></h3>
<p>The following values may be used as modifier, provided they are supported by
your terminal emulator.</p>
<div class="table-wrapper"><table><thead><tr><th>Modifier</th></tr></thead><tbody>
<tr><td><code>bold</code></td></tr>
<tr><td><code>dim</code></td></tr>
<tr><td><code>italic</code></td></tr>
<tr><td><code>underlined</code></td></tr>
<tr><td><code>slow_blink</code></td></tr>
<tr><td><code>rapid_blink</code></td></tr>
<tr><td><code>reversed</code></td></tr>
<tr><td><code>hidden</code></td></tr>
<tr><td><code>crossed_out</code></td></tr>
</tbody></table>
</div>
<blockquote>
<p>💡 The <code>underlined</code> modifier is deprecated and only available for backwards compatibility.
Its behavior is equivalent to setting <code>underline.style="line"</code>.</p>
</blockquote>
<h3 id="underline-style"><a class="header" href="#underline-style">Underline style</a></h3>
<p>One of the following values may be used as a value for <code>underline.style</code>, providing it is
supported by your terminal emulator.</p>
<div class="table-wrapper"><table><thead><tr><th>Modifier</th></tr></thead><tbody>
<tr><td><code>line</code></td></tr>
<tr><td><code>curl</code></td></tr>
<tr><td><code>dashed</code></td></tr>
<tr><td><code>dotted</code></td></tr>
<tr><td><code>double_line</code></td></tr>
</tbody></table>
</div>
<h3 id="inheritance"><a class="header" href="#inheritance">Inheritance</a></h3>
<p>Extend other themes by setting the <code>inherits</code> property to an existing theme.</p>
<pre><code class="language-toml">inherits = "boo_berry"
# Override the theming for "keyword"s:
"keyword" = { fg = "gold" }
# Override colors in the palette:
[palette]
berry = "#2A2A4D"
</code></pre>
<h3 id="rainbow"><a class="header" href="#rainbow">Rainbow</a></h3>
<p>The <code>rainbow</code> key is used for rainbow highlight for matching brackets.
The key is a list of styles.</p>
<pre><code class="language-toml">rainbow = ["#ff0000", "#ffa500", "#fff000", { fg = "#00ff00", modifiers = ["bold"] }]
</code></pre>
<p>Colors from the palette and modifiers may be used.</p>
<h3 id="scopes"><a class="header" href="#scopes">Scopes</a></h3>
<p>The following is a list of scopes available to use for styling:</p>
<h4 id="syntax-highlighting"><a class="header" href="#syntax-highlighting">Syntax highlighting</a></h4>
<p>These keys match <a href="https://tree-sitter.github.io/tree-sitter/syntax-highlighting#theme">tree-sitter scopes</a>.</p>
<p>When determining styling for a highlight, the longest matching theme key will be used. For example, if the highlight is <code>function.builtin.static</code>, the key <code>function.builtin</code> will be used instead of <code>function</code>.</p>
<p>We use a similar set of scopes as
<a href="https://www.sublimetext.com/docs/scope_naming.html">Sublime Text</a>. See also
<a href="https://macromates.com/manual/en/language_grammars">TextMate</a> scopes.</p>
<ul>
<li>
<p><code>attribute</code> - Class attributes, HTML tag attributes</p>
</li>
<li>
<p><code>type</code> - Types</p>
<ul>
<li><code>builtin</code> - Primitive types provided by the language (<code>int</code>, <code>usize</code>)</li>
<li><code>parameter</code> - Generic type parameters (<code>T</code>)</li>
<li><code>enum</code>
<ul>
<li><code>variant</code></li>
</ul>
</li>
</ul>
</li>
<li>
<p><code>constructor</code></p>
</li>
<li>
<p><code>constant</code> (TODO: constant.other.placeholder for <code>%v</code>)</p>
<ul>
<li><code>builtin</code> Special constants provided by the language (<code>true</code>, <code>false</code>, <code>nil</code> etc)
<ul>
<li><code>boolean</code></li>
</ul>
</li>
<li><code>character</code>
<ul>
<li><code>escape</code></li>
</ul>
</li>
<li><code>numeric</code> (numbers)
<ul>
<li><code>integer</code></li>
<li><code>float</code></li>
</ul>
</li>
</ul>
</li>
<li>
<p><code>string</code> (TODO: string.quoted.{single, double}, string.raw/.unquoted)?</p>
<ul>
<li><code>regexp</code> - Regular expressions</li>
<li><code>special</code>
<ul>
<li><code>path</code></li>
<li><code>url</code></li>
<li><code>symbol</code> - Erlang/Elixir atoms, Ruby symbols, Clojure keywords</li>
</ul>
</li>
</ul>
</li>
<li>
<p><code>comment</code> - Code comments</p>
<ul>
<li><code>line</code> - Single line comments (<code>//</code>)</li>
<li><code>block</code> - Block comments (e.g. (<code>/* */</code>)
<ul>
<li><code>documentation</code> - Documentation comments (e.g. <code>///</code> in Rust)</li>
</ul>
</li>
</ul>
</li>
<li>
<p><code>variable</code> - Variables</p>
<ul>
<li><code>builtin</code> - Reserved language variables (<code>self</code>, <code>this</code>, <code>super</code>, etc.)</li>
<li><code>parameter</code> - Function parameters</li>
<li><code>other</code>
<ul>
<li><code>member</code> - Fields of composite data types (e.g. structs, unions)</li>
</ul>
</li>
</ul>
</li>
<li>
<p><code>label</code></p>
</li>
<li>
<p><code>punctuation</code></p>
<ul>
<li><code>delimiter</code> - Commas, colons</li>
<li><code>bracket</code> - Parentheses, angle brackets, etc.</li>
<li><code>special</code> - String interpolation brackets.</li>
</ul>
</li>
<li>
<p><code>keyword</code></p>
<ul>
<li><code>control</code>
<ul>
<li><code>conditional</code> - <code>if</code>, <code>else</code></li>
<li><code>repeat</code> - <code>for</code>, <code>while</code>, <code>loop</code></li>
<li><code>import</code> - <code>import</code>, <code>export</code></li>
<li><code>return</code></li>
<li><code>exception</code></li>
</ul>
</li>
<li><code>operator</code> - <code>or</code>, <code>in</code></li>
<li><code>directive</code> - Preprocessor directives (<code>#if</code> in C)</li>
<li><code>function</code> - <code>fn</code>, <code>func</code></li>
<li><code>storage</code> - Keywords describing how things are stored
<ul>
<li><code>type</code> - The type of something, <code>class</code>, <code>function</code>, <code>var</code>, <code>let</code>, etc.</li>
<li><code>modifier</code> - Storage modifiers like <code>static</code>, <code>mut</code>, <code>const</code>, <code>ref</code>, etc.</li>
</ul>
</li>
</ul>
</li>
<li>
<p><code>operator</code> - <code>||</code>, <code>+=</code>, <code>></code></p>
</li>
<li>
<p><code>function</code></p>
<ul>
<li><code>builtin</code></li>
<li><code>method</code></li>
<li><code>macro</code></li>
<li><code>special</code> (preprocessor in C)</li>
</ul>
</li>
<li>
<p><code>tag</code> - Tags (e.g. <code><body></code> in HTML)</p>
<ul>
<li><code>builtin</code></li>
</ul>
</li>
<li>
<p><code>namespace</code></p>
</li>
<li>
<p><code>special</code></p>
</li>
<li>
<p><code>markup</code></p>
<ul>
<li><code>heading</code>
<ul>
<li><code>marker</code></li>
<li><code>1</code>, <code>2</code>, <code>3</code>, <code>4</code>, <code>5</code>, <code>6</code> - heading text for h1 through h6</li>
</ul>
</li>
<li><code>list</code>
<ul>
<li><code>unnumbered</code></li>
<li><code>numbered</code></li>
<li><code>checked</code></li>
<li><code>unchecked</code></li>
</ul>
</li>
<li><code>bold</code></li>
<li><code>italic</code></li>
<li><code>strikethrough</code></li>
<li><code>link</code>
<ul>
<li><code>url</code> - URLs pointed to by links</li>
<li><code>label</code> - non-URL link references</li>
<li><code>text</code> - URL and image descriptions in links</li>
</ul>
</li>
<li><code>quote</code></li>
<li><code>raw</code>
<ul>
<li><code>inline</code></li>
<li><code>block</code></li>
</ul>
</li>
</ul>
</li>
<li>
<p><code>diff</code> - version control changes</p>
<ul>
<li><code>plus</code> - additions
<ul>
<li><code>gutter</code> - gutter indicator</li>
</ul>
</li>
<li><code>minus</code> - deletions
<ul>
<li><code>gutter</code> - gutter indicator</li>
</ul>
</li>
<li><code>delta</code> - modifications
<ul>
<li><code>moved</code> - renamed or moved files/changes</li>
<li><code>gutter</code> - gutter indicator</li>
</ul>
</li>
</ul>
</li>
</ul>
<h4 id="interface"><a class="header" href="#interface">Interface</a></h4>
<p>These scopes are used for theming the editor interface:</p>
<ul>
<li><code>markup</code>
<ul>
<li><code>normal</code>
<ul>
<li><code>completion</code> - for completion doc popup UI</li>
<li><code>hover</code> - for hover popup UI</li>
</ul>
</li>
<li><code>heading</code>
<ul>
<li><code>completion</code> - for completion doc popup UI</li>
<li><code>hover</code> - for hover popup UI</li>
</ul>
</li>
<li><code>raw</code>
<ul>
<li><code>inline</code>
<ul>
<li><code>completion</code> - for completion doc popup UI</li>
<li><code>hover</code> - for hover popup UI</li>
</ul>
</li>
</ul>
</li>
</ul>
</li>
</ul>
<div class="table-wrapper"><table><thead><tr><th>Key</th><th>Notes</th></tr></thead><tbody>
<tr><td><code>ui.background</code></td><td></td></tr>
<tr><td><code>ui.background.separator</code></td><td>Picker separator below input line</td></tr>
<tr><td><code>ui.cursor</code></td><td></td></tr>
<tr><td><code>ui.cursor.normal</code></td><td></td></tr>
<tr><td><code>ui.cursor.insert</code></td><td></td></tr>
<tr><td><code>ui.cursor.select</code></td><td></td></tr>
<tr><td><code>ui.cursor.match</code></td><td>Matching bracket etc.</td></tr>
<tr><td><code>ui.cursor.primary</code></td><td>Cursor with primary selection</td></tr>
<tr><td><code>ui.cursor.primary.normal</code></td><td></td></tr>
<tr><td><code>ui.cursor.primary.insert</code></td><td></td></tr>
<tr><td><code>ui.cursor.primary.select</code></td><td></td></tr>
<tr><td><code>ui.debug.breakpoint</code></td><td>Breakpoint indicator, found in the gutter</td></tr>
<tr><td><code>ui.debug.active</code></td><td>Indicator for the line at which debugging execution is paused at, found in the gutter</td></tr>
<tr><td><code>ui.gutter</code></td><td>Gutter</td></tr>
<tr><td><code>ui.gutter.selected</code></td><td>Gutter for the line the cursor is on</td></tr>
<tr><td><code>ui.highlight.frameline</code></td><td>Line at which debugging execution is paused at</td></tr>
<tr><td><code>ui.linenr</code></td><td>Line numbers</td></tr>
<tr><td><code>ui.linenr.selected</code></td><td>Line number for the line the cursor is on</td></tr>
<tr><td><code>ui.statusline</code></td><td>Statusline</td></tr>
<tr><td><code>ui.statusline.inactive</code></td><td>Statusline (unfocused document)</td></tr>
<tr><td><code>ui.statusline.normal</code></td><td>Statusline mode during normal mode (<a href="./configuration.html#editor-section">only if <code>editor.color-modes</code> is enabled</a>)</td></tr>
<tr><td><code>ui.statusline.insert</code></td><td>Statusline mode during insert mode (<a href="./configuration.html#editor-section">only if <code>editor.color-modes</code> is enabled</a>)</td></tr>
<tr><td><code>ui.statusline.select</code></td><td>Statusline mode during select mode (<a href="./configuration.html#editor-section">only if <code>editor.color-modes</code> is enabled</a>)</td></tr>
<tr><td><code>ui.statusline.separator</code></td><td>Separator character in statusline</td></tr>
<tr><td><code>ui.bufferline</code></td><td>Style for the buffer line</td></tr>
<tr><td><code>ui.bufferline.active</code></td><td>Style for the active buffer in buffer line</td></tr>
<tr><td><code>ui.bufferline.background</code></td><td>Style for bufferline background</td></tr>
<tr><td><code>ui.popup</code></td><td>Documentation popups (e.g. Space + k)</td></tr>
<tr><td><code>ui.popup.info</code></td><td>Prompt for multiple key options</td></tr>
<tr><td><code>ui.window</code></td><td>Borderlines separating splits</td></tr>
<tr><td><code>ui.help</code></td><td>Description box for commands</td></tr>
<tr><td><code>ui.text</code></td><td>Default text style, command prompts, popup text, etc.</td></tr>
<tr><td><code>ui.text.focus</code></td><td>The currently selected line in the picker</td></tr>
<tr><td><code>ui.text.inactive</code></td><td>Same as <code>ui.text</code> but when the text is inactive (e.g. suggestions)</td></tr>
<tr><td><code>ui.text.info</code></td><td>The key: command text in <code>ui.popup.info</code> boxes</td></tr>
<tr><td><code>ui.virtual.ruler</code></td><td>Ruler columns (see the <a href="./configuration.html#editor-section"><code>editor.rulers</code> config</a>)</td></tr>
<tr><td><code>ui.virtual.whitespace</code></td><td>Visible whitespace characters</td></tr>
<tr><td><code>ui.virtual.indent-guide</code></td><td>Vertical indent width guides</td></tr>
<tr><td><code>ui.virtual.inlay-hint</code></td><td>Default style for inlay hints of all kinds</td></tr>
<tr><td><code>ui.virtual.inlay-hint.parameter</code></td><td>Style for inlay hints of kind <code>parameter</code> (LSPs are not required to set a kind)</td></tr>
<tr><td><code>ui.virtual.inlay-hint.type</code></td><td>Style for inlay hints of kind <code>type</code> (LSPs are not required to set a kind)</td></tr>
<tr><td><code>ui.virtual.wrap</code></td><td>Soft-wrap indicator (see the <a href="./configuration.html#editor-section"><code>editor.soft-wrap</code> config</a>)</td></tr>
<tr><td><code>ui.virtual.jump-label</code></td><td>Style for virtual jump labels</td></tr>
<tr><td><code>ui.menu</code></td><td>Code and command completion menus</td></tr>
<tr><td><code>ui.menu.selected</code></td><td>Selected autocomplete item</td></tr>
<tr><td><code>ui.menu.scroll</code></td><td><code>fg</code> sets thumb color, <code>bg</code> sets track color of scrollbar</td></tr>
<tr><td><code>ui.selection</code></td><td>For selections in the editing area</td></tr>
<tr><td><code>ui.selection.primary</code></td><td></td></tr>
<tr><td><code>ui.highlight</code></td><td>Highlighted lines in the picker preview</td></tr>
<tr><td><code>ui.cursorline.primary</code></td><td>The line of the primary cursor (<a href="./configuration.html#editor-section">if cursorline is enabled</a>)</td></tr>
<tr><td><code>ui.cursorline.secondary</code></td><td>The lines of any other cursors (<a href="./configuration.html#editor-section">if cursorline is enabled</a>)</td></tr>
<tr><td><code>ui.cursorcolumn.primary</code></td><td>The column of the primary cursor (<a href="./configuration.html#editor-section">if cursorcolumn is enabled</a>)</td></tr>
<tr><td><code>ui.cursorcolumn.secondary</code></td><td>The columns of any other cursors (<a href="./configuration.html#editor-section">if cursorcolumn is enabled</a>)</td></tr>
<tr><td><code>warning</code></td><td>Diagnostics warning (gutter)</td></tr>
<tr><td><code>error</code></td><td>Diagnostics error (gutter)</td></tr>
<tr><td><code>info</code></td><td>Diagnostics info (gutter)</td></tr>
<tr><td><code>hint</code></td><td>Diagnostics hint (gutter)</td></tr>
<tr><td><code>diagnostic</code></td><td>Diagnostics fallback style (editing area)</td></tr>
<tr><td><code>diagnostic.hint</code></td><td>Diagnostics hint (editing area)</td></tr>
<tr><td><code>diagnostic.info</code></td><td>Diagnostics info (editing area)</td></tr>
<tr><td><code>diagnostic.warning</code></td><td>Diagnostics warning (editing area)</td></tr>
<tr><td><code>diagnostic.error</code></td><td>Diagnostics error (editing area)</td></tr>
<tr><td><code>diagnostic.unnecessary</code></td><td>Diagnostics with unnecessary tag (editing area)</td></tr>
<tr><td><code>diagnostic.deprecated</code></td><td>Diagnostics with deprecated tag (editing area)</td></tr>
</tbody></table>
</div>
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