Admin: Update focus state on color picker.

Fix the focus color on the Iris color picker slider and color base selectors to the new admin color scheme.

Props shailu25, hmbashar, huzaifaalmesbah, noruzzaman, rahultank, joedolson.
Fixes #64754.

git-svn-id: https://develop.svn.wordpress.org/trunk@61779 602fd350-edb4-49c9-b593-d223f7449a82

Author: joedolson

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

@@ -117,14 +117,14 @@
 
 .iris-picker .ui-square-handle:focus,
 .iris-picker .iris-strip .ui-slider-handle:focus {
-	border-color: #3582c4;
+	border-color: var(--wp-admin-theme-color, #3858e9);
 	border-style: solid;
-	box-shadow: 0 0 0 1px #3582c4;
+	box-shadow: 0 0 0 var(--wp-admin-border-width-focus, 1.5px) var(--wp-admin-theme-color, #3858e9);
 	outline: 2px solid transparent;
 }
 
 .iris-picker .iris-palette:focus {
-	box-shadow: 0 0 0 2px #3582c4;
+	box-shadow: 0 0 0 var(--wp-admin-border-width-focus, 1.5px) var(--wp-admin-theme-color, #3858e9);
 }
 
 @media screen and (max-width: 782px) {