HDRainbow is a fast, free and secure online colour palette generator from images. Your images are never sent to a server, they are processed inside your browser window. You only need to drag and drop your image in the image area, HDRainbow will do the rest. It will show you a colour palette which contains all colours in the image. Now you can copy HEX, RGB or HSL code by clicking on any color. You can also download this colour palette for later use. Click HERE to visit HDRainbow.