diff --git a/src/utils.ts b/src/utils.ts
index ad8a1e6..bb54ab8 100644
--- a/src/utils.ts
+++ b/src/utils.ts
@@ -52,7 +52,7 @@ export function resolveStops(v: string[]): ColorStop[] {
   return stops
 }
 
-const REGEX = /^(-?\d+\.?\d*)(%|vw|vh|px|em|rem|deg|rad|grad|turn)$/
+const REGEX = /^(-?\d+\.?\d*)(%|vw|vh|px|em|rem|deg|rad|grad|turn|ch|vmin|vmax)$/
 
 function isHint(v: string) {
   return REGEX.test(v)