Color Blind Friendly: This icon indicates that a given color scheme will not confuse people with red-green color blindness. Red-green color blindness affects approximately 8 percent of men and 0.4 percent of women, although its severity varies and so some schemes will have a "?" indicating it may be a problem for some, but not all folks with color vision impairment.

Color Printing Friendly: Suitable for desktop color printing (based on our color printers - your mileage will vary and you should check on your own printer). We checked Matchprint proofs for all of these schemes and they are all printed in a 2003 journal article and the book Designing Better Maps by Cynthia Brewer. CMYK specs are as close to press-ready as is reasonable.

Photocopy Friendly: This indicates that a given color scheme will withstand black and white photocopying. Diverging schemes can not be photocopied successfully. Differences in lightness should be preserved with sequential schemes.

Laptop (LCD) Friendly: This icon indicates that a given color scheme is suitable for viewing on a laptop LCD display. Small, portable LCD monitors tend to wash-out colors which results in noticeable differences from computer-to-computer.