Color Science is a complex topic that can be hard to find documentationfor without purchasing books. For those on a budget, Wikipedia and Google can turn up some useful information, but there are often glaring omissions, inaccuracies, or questions left un-answered.

Luckily, Bruce Lindbloom has compiled an excellent website (brucelindbloom.com) full of Color Science information, calculators, and examples. Of particular use are some of the following:

• CIE Color Calculator - Conversions between color spaces.
• Useful Color Equations - Conversions, Delta E, misc. other equations.
• Delta E (CIE 2000)

While a lot of the material is a bit hard to get into without a basic understanding of color, it’s definitely worthwhile to pick through if you’re in the Graphic Communication industry (or are just curious about the topic).