1 files changed, 5 insertions, 0 deletions
diff --git a/src/fields/Doc.ts b/src/fields/Doc.ts
index e4087cf43..f6efefdf9 100644
--- a/src/fields/Doc.ts
+++ b/src/fields/Doc.ts
@@ -25,6 +25,7 @@ import { deleteProperty, GetEffectiveAcl, getField, getter, inheritParentAcls, m
 import JSZip = require("jszip");
 import { CurrentUserUtils } from "../client/util/CurrentUserUtils";
 import { IconProp } from "@fortawesome/fontawesome-svg-core";
+import Color = require("color");
 
 export namespace Field {
     export function toKeyValueString(doc: Doc, key: string): string {
@@ -1087,6 +1088,10 @@ export namespace Doc {
     }
 
     export function matchFieldValue(doc: Doc, key: string, value: any): boolean {
+        if (value === "isTransparent(__value__)") {
+            const isTransparent = (color: string) => color !== "" && (Color(color).alpha() !== 1);
+            return isTransparent(StrCast(doc[key]));
+        }
         const fieldVal = doc[key];
         if (Cast(fieldVal, listSpec("string"), []).length) {
             const vals = Cast(fieldVal, listSpec("string"), []);