diff --git a/styles/src/themes/common/syntax.ts b/styles/src/themes/common/syntax.ts
index 925ed7e5c1..1645aaea87 100644
--- a/styles/src/themes/common/syntax.ts
+++ b/styles/src/themes/common/syntax.ts
@@ -4,7 +4,7 @@ import { ColorScheme } from "./colorScheme"
 import chroma from "chroma-js"
 
 export interface SyntaxHighlightStyle {
-    color: string
+    color?: string
     weight?: FontWeight
     underline?: boolean
     italic?: boolean