diff --git a/CHANGELOG.md b/CHANGELOG.md
index 48f0a05..74f38f1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,13 @@
 # Changelog
 
+#### 2.9.0
+
+- Improves syntax highlighting for the following languages:
+    - Ruby
+    - ERB
+    - RDoc
+    - Slim
+
 #### 2.8.0
 
 - Improves syntax highlighting for the following languages:
diff --git a/scripts/config/theme.yaml b/scripts/config/theme.yaml
index 0ee453d..c44e709 100644
--- a/scripts/config/theme.yaml
+++ b/scripts/config/theme.yaml
@@ -115,7 +115,29 @@ inheriting-attributes:
   REGEXP.REDUNDANT_ESCAPE: DEFAULT_VALID_STRING_ESCAPE
   ReSharper.STRING_ESCAPE_CHARACTER_2: DEFAULT_VALID_STRING_ESCAPE
   REST.INLINE: DEFAULT_IDENTIFIER
+  RHTML_COMMENT_ID: HTML_COMMENT
+  RUBY_BAD_CHARACTER: BAD_CHARACTER
+  RUBY_COMMENT: DEFAULT_DOC_COMMENT
+  RUBY_CONSTANT_DECLARATION: DEFAULT_CONSTANT
+  RUBY_CONSTANT: DEFAULT_CONSTANT
+  RUBY_ESCAPE_SEQUENCE: DEFAULT_VALID_STRING_ESCAPE
+  RUBY_GVAR: DEFAULT_GLOBAL_VARIABLE
+  RUBY_INVALID_ESCAPE_SEQUENCE: DEFAULT_INVALID_STRING_ESCAPE
+  RUBY_LINE_CONTINUATION: DEFAULT_COMMA
+  RUBY_LOCAL_VAR_ID: DEFAULT_LOCAL_VARIABLE
+  RUBY_METHOD_NAME: DEFAULT_INSTANCE_METHOD
+  RUBY_NUMBER: DEFAULT_NUMBER
+  RUBY_PARAMDEF_CALL: DEFAULT_STATIC_METHOD
+  RUBY_PARAMETER_ID: DEFAULT_PARAMETER
+  RUBY_SPECIFIC_CALL: DEFAULT_STATIC_METHOD
+  RUBY_WORDS: DEFAULT_STRING
   SASS_COMMENT: CSS.COMMENT
+  SLIM_COMMENT: DEFAULT_DOC_COMMENT
+  SLIM_FILTER: DEFAULT_LABEL
+  SLIM_PARENTHS: DEFAULT_PARENTHS
+  SLIM_RUBY_CODE: DEFAULT_TEMPLATE_LANGUAGE_COLOR
+  SLIM_STATIC_CONTENT: TEXT
+  SLIM_STRING_INTERPOLATED: DEFAULT_STRING
   SQL_OUTER_QUERY_COLUMN: SQL_COLUMN
   SQL_SYNTHETIC_ENTITY: DEFAULT_PREDEFINED_SYMBOL
   Static method access: STATIC_METHOD_ATTRIBUTES
@@ -492,6 +514,12 @@ attributes:
     foreground: purple
     italic: theme
   PY.STRING: green
+  RDOC_DIRECTIVE: fountainBlue
+  RDOC_EMAIL: purple
+  RDOC_HEADINGS: fountainBlue
+  RDOC_IDENTIFIER: coral
+  RDOC_KEYWORD: purple
+  RDOC_URL: malibu
   REGEXP.BRACES: whiskey
   REGEXP.BRACKETS: whiskey
   REGEXP.CHAR_CLASS: fountainBlue
@@ -524,45 +552,18 @@ attributes:
   REST.INTERPRETED:
     background: 3c4b33
   REST.SECTION.HEADER: fountainBlue
-  RHTML_COMMENT_ID:
-    foreground: 59626f
-    italic: theme
-  RHTML_EXPRESSION_END_ID: be4f44
-  RHTML_EXPRESSION_START_ID: be4f44
-  RHTML_OMIT_NEW_LINE_ID: be4f44
-  RHTML_SCRIPTLET_END_ID: be4f44
-  RHTML_SCRIPTLET_START_ID: be4f44
-  RUBY_COMMENT:
-    foreground: dark
-    italic: theme
-  RUBY_CONSTANT: whiskey
-  RUBY_CONSTANT_DECLARATION: whiskey
-  RUBY_CVAR: df6a73
-  RUBY_ESCAPE_SEQUENCE: fountainBlue
-  RUBY_EXPR_IN_STRING: be5046
-  RUBY_GVAR: df6a73
-  RUBY_HASH_ASSOC: a6b2c0
+  RHTML_EXPRESSION_END_ID: chalky
+  RHTML_EXPRESSION_START_ID: chalky
+  RHTML_OMIT_NEW_LINE_ID: chalky
+  RHTML_SCRIPTING_BACKGROUND_ID: {}
+  RHTML_SCRIPTLET_END_ID: chalky
+  RHTML_SCRIPTLET_START_ID: chalky
+  RUBY_EXPR_IN_STRING: coral
   RUBY_HEREDOC_CONTENT: green
-  RUBY_HEREDOC_ID: green
-  RUBY_INTERPOLATED_STRING: green
-  RUBY_INVALID_ESCAPE_SEQUENCE:
-    foreground: 68e868
-    background: '481515'
-  RUBY_IVAR: df6a73
-  RUBY_KEYWORD: purple
-  RUBY_LINE_CONTINUATION: a6b2c0
-  RUBY_LOCAL_VAR_ID: lightWhite
-  RUBY_METHOD_NAME: malibu
-  RUBY_NTH_REF: coral
-  RUBY_NUMBER: whiskey
-  RUBY_OPERATION_SIGN: a6b2c0
-  RUBY_PARAMDEF_CALL: lightWhite
-  RUBY_PARAMETER_ID: lightWhite
+  RUBY_HEREDOC_ID: purple
+  RUBY_NTH_REF: whiskey
   RUBY_REGEXP: fountainBlue
-  RUBY_SPECIFIC_CALL: malibu
-  RUBY_STRING: green
   RUBY_SYMBOL: fountainBlue
-  RUBY_WORDS: green
   RUNTIME_ERROR:
     effect_color: ff8c00
     error_stripe_color: error
@@ -575,16 +576,11 @@ attributes:
   SLIM_BAD_CHARACTER:
     foreground: 272b33
     background: f2777a
-  SLIM_CLASS: df6a73
-  SLIM_COMMENT:
-    foreground: 59626f
-    italic: theme
-  SLIM_DOCTYPE_KWD: df6a73
-  SLIM_FILTER: df6a73
-  SLIM_ID: df6a73
-  SLIM_INTERPOLATION: green
-  SLIM_STRING_INTERPOLATED: green
-  SLIM_TAG: df6a73
+  SLIM_CLASS: whiskey
+  SLIM_DOCTYPE_KWD: coral
+  SLIM_ID: fountainBlue
+  SLIM_INTERPOLATION: coral
+  SLIM_TAG: coral
   SLIM_TAG_ATTR_KEY: whiskey
   STATIC_FINAL_FIELD_ATTRIBUTES: whiskey
   STATIC_METHOD_IMPORTED_ATTRIBUTES: malibu