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diff --git a/runtime/queries/glimmer/highlights.scm b/runtime/queries/glimmer/highlights.scm
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+; === Tag Names ===
+
+; Tags that start with a lower case letter are HTML tags
+; We'll also use this highlighting for named blocks (which start with `:`)
+((tag_name) @tag
+  (#match? @tag "^(:)?[a-z]"))
+; Tags that start with a capital letter are Glimmer components
+((tag_name) @constructor
+  (#match? @constructor "^[A-Z]"))
+
+(attribute_name) @attribute
+
+(string_literal) @string
+(number_literal) @constant.numeric.integer
+(boolean_literal) @constant.builtin.boolean
+
+(concat_statement) @string
+
+; === Block Statements ===
+
+; Highlight the brackets
+(block_statement_start) @punctuation.delimiter
+(block_statement_end) @punctuation.delimiter
+
+; Highlight `if`/`each`/`let`
+(block_statement_start path: (identifier) @keyword.control.conditional)
+(block_statement_end path: (identifier) @keyword.control.conditional)
+((mustache_statement (identifier) @keyword.control.conditional)
+ (#eq? @keyword.control.conditional "else"))
+
+; == Mustache Statements ===
+
+; Hightlight the whole statement, to color brackets and separators
+(mustache_statement) @punctuation.delimiter
+
+; An identifier in a mustache expression is a variable
+((mustache_statement [
+  (path_expression (identifier) @variable)
+  (identifier) @variable
+  ])
+  (#not-any-of? @variable "yield" "outlet" "this" "else"))
+; As are arguments in a block statement
+((block_statement_start argument: [
+  (path_expression (identifier) @variable)
+  (identifier) @variable
+  ])
+ (#not-eq? @variable "this"))
+; As is an identifier in a block param
+(block_params (identifier) @variable)
+; As are helper arguments
+((helper_invocation argument: [
+  (path_expression (identifier) @variable)
+  (identifier) @variable
+  ])
+  (#not-eq? @variable "this"))
+; `this` should be highlighted as a built-in variable
+((identifier) @variable.builtin
+  (#eq? @variable.builtin "this"))
+
+; If the identifier is just "yield" or "outlet", it's a keyword
+((mustache_statement (identifier) @keyword.control.return)
+  (#any-of? @keyword.control.return "yield" "outlet"))
+
+; Helpers are functions
+((helper_invocation helper: [
+  (path_expression (identifier) @function)
+  (identifier) @function
+  ])
+  (#not-any-of? @function "if" "yield"))
+
+((helper_invocation helper: (identifier) @keyword.control.conditional)
+  (#any-of? @keyword.control.conditional "if" "yield"))
+
+(hash_pair key: (identifier) @variable)
+(hash_pair value: (identifier) @variable)
+(hash_pair [
+  (path_expression (identifier) @variable)
+  (identifier) @variable
+  ])
+
+(comment_statement) @comment
+
+(attribute_node "=" @operator)
+
+(block_params "as" @keyword.control)
+(block_params "|" @operator)
+
+[
+  "<"
+  ">"
+  "</"
+  "/>"
+] @punctuation.delimiter
+