diff --git a/src/lib/utils/post-utils.ts b/src/lib/utils/post-utils.ts
index 63a4188d..a9d0f01f 100644
--- a/src/lib/utils/post-utils.ts
+++ b/src/lib/utils/post-utils.ts
@@ -1,4 +1,8 @@
 export function hashStringToColor(str: string): string {
+  if (!str) {
+    return '';
+  }
+
   let hash = 0;
   for (let i = 0; i < str.length; i++) {
     hash = str.charCodeAt(i) + ((hash << 5) - hash);