A friend always used to ask, “Hey Jack, what colour can you see because I can not see the correct colour”. Sim Daltonism is a colour blindness simulator for Mac OS X. In real-time it filters the area around the mouse pointer and displays the result just as it would be seen by a colour blind person. For us designers and artists, choosing the correct combination of hues either from the pantone book or from the swatches option in Photoshop is so important due to the fact that it plays a major part in the process of creativity.
The science of color is sometimes called chromatics. This includes the perception of colour by the human eye and brain, the origin of color in materials, colour theory in art, and the physics of electromagnetic radiation which is referred to as light.