diff --git a/src/main/java/com/houarizegai/calculator/util/ColorUtil.java b/src/main/java/com/houarizegai/calculator/util/ColorUtil.java
index c2d0e4a..3536f0b 100644
--- a/src/main/java/com/houarizegai/calculator/util/ColorUtil.java
+++ b/src/main/java/com/houarizegai/calculator/util/ColorUtil.java
@@ -13,11 +13,14 @@ private ColorUtil() {
      * Converts a hexadecimal color code to a Color object.
      *
      * @param colorHex the hexadecimal color code to convert
-     * @return the Color object representing the hexadecimal color code, or null if the input is null
+     * @return the Color object representing the given hexadecimal color code, or null if the input is null
      * @throws NumberFormatException if the input is not a valid hexadecimal color code
-     * @example
-     * Color color = hex2Color("#FF0000");
-     * // color is now a Color object representing the color red
+     * @throws StringIndexOutOfBoundsException if the input is not of the expected length
+     *
+     * Example:
+     * <pre>{@code
+     * Color color = hex2Color("FFA500");
+     * }</pre>
      */
     public static Color hex2Color(String colorHex) {
         // test 1
@@ -27,6 +30,20 @@ public static Color hex2Color(String colorHex) {
                         Integer.valueOf(colorHex.substring(2, 4), 16),
                         Integer.valueOf(colorHex.substring(4, 6), 16)))
                 .orElse(null);
+    /**
+     * Converts a hexadecimal color code to a Color object.
+     *
+     * @param colorHex the hexadecimal color code to convert
+     * @param dType the type of color representation
+     * @return the Color object representing the given hexadecimal color code, or null if the input is null
+     * @throws NumberFormatException if the input hexadecimal color code is not in the expected format
+     * @throws NullPointerException if the input colorHex is null
+     *
+     * Example:
+     * <pre>{@code
+     * Color color = hex2Color("FFA500", "RGB");
+     * }</pre>
+     */
         
     }