libui: Add getters for separate color values

libui/include/ui/Color.h

@@ -13,6 +13,46 @@ namespace ui
             u8 colors[4];
         };
 
+        /**
+         * @brief Return the blue value of this color.
+         *
+         * @return constexpr u8 The blue value.
+         */
+        constexpr u8 red() const
+        {
+            return colors[2];
+        }
+
+        /**
+         * @brief Return the green value of this color.
+         *
+         * @return constexpr u8 The green value.
+         */
+        constexpr u8 green() const
+        {
+            return colors[1];
+        }
+
+        /**
+         * @brief Return the blue value of this color.
+         *
+         * @return constexpr u8 The blue value.
+         */
+        constexpr u8 blue() const
+        {
+            return colors[0];
+        }
+
+        /**
+         * @brief Return the alpha value of this color.
+         *
+         * @return constexpr u8 The alpha value.
+         */
+        constexpr u8 alpha() const
+        {
+            return colors[3];
+        }
+
         /**
          * @brief Construct a new color from a 32-bit ARGB integer.
          *