Customize: Use fixed-width illustrative placeholder for hex field in color picker to prevent truncation.

Props stormrockwell, sagarprajapati, Presskopp, afercia, tejas5989, westonruter, mayurk for testing.
Fixes #39096.


git-svn-id: https://develop.svn.wordpress.org/trunk@40471 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-admin/css/color-picker.css

@@ -133,4 +133,11 @@
 	box-shadow:
 		0 0 0 1px #5b9dd9,
 		0 0 2px 1px rgba(30, 140, 190, .8);
-}
+}
+
+@media screen and ( max-width: 782px ) {
+	.wp-picker-container input[type="text"].wp-color-picker {
+		margin-right: 6px;
+		padding: 3px 5px;
+	}
+}