If you want to feel like you're tripping out on wonderful drugs and/or see all the colours of the RGB spectrum in one image, going to the allRGB website should have you covered. It's a project that show off images that contain all 16,777,216 distinct colours inside the RGB spectrum. Each of those colours pop up in a single pixel on an image. Gnarly.
Currently, 36 different artists have uploaded 99 images to the allRGB site. Some look like desktop monitor tests while others are remixed colour versions of real pictures. Just check out how different the same colours can be: