Realtime Colors is described as 'If you want to choose a color palette for UI properly, the least you have to do is put them on a lofi UI or grayscale the entire UI on Figma, Adobe XD, or similar platforms to get a better idea of what those colors will actually look like on a product' and is a Color Picker tool in the development category. There are more than 50 alternatives to Realtime Colors for a variety of platforms, including Windows, Web-based, Mac, Linux and Flathub apps. The best Realtime Colors alternative is UI Colorful, which is free. Other great apps like Realtime Colors are Just Color Picker, gpick, Instant Eyedropper and Rickrack.