- Every designer needs a little inspiration now and then - particularly when it comes to colour. Color Index is fuel for creativity. It provides more than one thousand colour combinations and formulas to help creative professionals thing through design dilemmas and create effective graphics for both print and the web. From progressive colours to natural tones. Color Index makes choosing hues for any job easier. Anyone can start working with colour in exciting ways to create original, eye-catching designs that pop off the page.