diff --git a/mode/idris.py b/mode/idris.py
index 087549f..f3f5187 100644
--- a/mode/idris.py
+++ b/mode/idris.py
@@ -31,7 +31,7 @@ class IdrisGrammar(Grammar):
 
         PatternRule(r'spaces', r'[ \t]+'),
         PatternRule(r'eol', r'\n'),
-        PatternRule(r'delimiter', r'[\[\](){},;]'),
+        PatternRule(r'delimiter', r'[\[\](){},;$]'),
         PatternRule(r'idris.xyz', r'(?:=>|->|<-|=|:)(?![-!#$%&\*\+./<=>\?@\\^|~:])'),
 
         PatternMatchRule('x', r"(module)( +)([a-zA-Z0-9_']+)", "idris.keyword", "spaces", "idris.module"),
@@ -42,6 +42,7 @@ class IdrisGrammar(Grammar):
 
         RegionRule(r'string', r'"', StringGrammar, r'"'),
         PatternRule(r'idris.keyword', r"(?:with|where|using|try|trivial|total|then|term|syntax|solve|rewrite|refine|record|public|private|prefix|pattern|partial|parameters|of|namespace|mutual|module|let|intros|instance|infixr|infixl|infix|in|import|if|focus|exact|else|dsl|do|data|compute|codata|class|case|attack|abstract)(?![a-zA-Z0-9_'])"),
+        PatternRule(r'idris.builtin', "(?:_|implicit|default|auto)(?![a-zA-Z0-9_'])"),
 
         PatternRule(r'idris.name', r"['_]?[A-Z][a-zA-Z0-9_']+"),
         PatternRule(r'idris.word', r"[a-zA-Z0-9_']+"),
@@ -85,8 +86,9 @@ class Idris(Fundamental):
     closetags   = {')': '(', '}': '{', ']': '['}
     colors      = {
         'idris.keyword': hi_magenta,
+        'idris.builtin': hi_magenta,
         'idris.module': hi_yellow,
-        'idris.name': hi_green,
+        'idris.name': hi_blue,
         'idris.xyz': hi_cyan,
         'idris.directive': hi_orange,
     }