Add missing variable property to Syntax

styles/src/themes/common/colorScheme.ts

@@ -160,7 +160,7 @@ export interface Syntax {
     "type.builtin": SyntaxHighlightStyle
 
     // == Values
-
+    variable: SyntaxHighlightStyle,
     // racket: lang_name
     "variable.builtin": SyntaxHighlightStyle
     // this, ...

styles/src/themes/common/syntax.ts

@@ -120,6 +120,9 @@ function buildDefaultSyntax(colorScheme: ColorScheme): Syntax {
         "type.builtin": {
             color: color.type,
         },
+        variable: {
+            color: color.primary,
+        },
         "variable.builtin": {
             color: colorScheme.ramps.blue(0.5).hex(),
         },