diff --git a/public/css/st-tailwind.css b/public/css/st-tailwind.css
index 7d8d8e178..fa3c90339 100644
--- a/public/css/st-tailwind.css
+++ b/public/css/st-tailwind.css
@@ -524,6 +524,10 @@ textarea:disabled {
     opacity: 0.5
 }
 
+.grayscale {
+    filter: grayscale(100%);
+}
+
 .opacity1 {
     opacity: 1 !important;
 }