KhmerBoard is a free iPhone app developed by Sok Rotha. It falls under the category of Business & Productivity. This app offers a unique and customizable Khmer extension keyboard for your iPhone. With KhmerBoard, you can personalize the keys, including fonts and colors, as well as the background, allowing you to create a keyboard style that suits your preferences and personality.

To change the color of the keyboard, simply enable the "Allow Full Access" option in the Settings menu under General > Keyboard. This will give you the freedom to choose from a variety of vibrant and eye-catching colors for your Khmer keyboard.