diff --git a/src/utils.js b/src/utils.js
index 7b0e1a1..67147c8 100644
--- a/src/utils.js
+++ b/src/utils.js
@@ -8,7 +8,6 @@
  */
 
 import ColorTableView from './ui/colortableview';
-import { normalizeColorCode } from '@ckeditor/ckeditor5-ui/src/colorgrid/utils';
 
 /**
  * The name of the font size plugin.
@@ -112,3 +111,11 @@ export function addColorTableToDropdown( { dropdownView, colors, columns, remove
 
 	return colorTableView;
 }
+
+// Fixes the color value string.
+//
+// @param {String} value
+// @returns {String}
+function normalizeColorCode( value ) {
+	return value.replace( /\s/g, '' );
+}