diff --git a/src/components/Form/style.css b/src/components/Form/style.css
index de974fa..b35217f 100644
--- a/src/components/Form/style.css
+++ b/src/components/Form/style.css
@@ -80,6 +80,6 @@
     top: calc((var(--select-height) - 24px) / 2);
     right: 0;
     pointer-events: none;
-    border-left: 0.2rem solid var(--color-black);
+    border-left: 0.1rem solid color(var(--color-black) alpha(0.2));
   }
 }