Alvaro, Thank you for your perspective. I will certainly keep it in mind for future designs. > You could use a bicolor led that uses blue instead of green or red; this > is > much more clear for me. Just to clarify, you mean Blue-Red, or Blue-Green? What should be the second color? Also, I'm not sure I understand how or why turning off the lights in a room, helps you see the colors better. Is it because the difference in brightness is more obvious in the dark? > Thanks for worrying about color-blinded people. A word of caution here, > for > all of you not color-blinded: there are A LOT OF people out there (mainly > men) with problems to differentiate colors. I often use criterions based > in > my color limitations when I buy things. At times, the fact that I can use > the product without the need of turning off the lights is the key factor > that makes the decission between similar products. Not the price, not even > the specifications, so this is a key factor in my designs. And this is > specially true in our (electronic thingies full of color lights all > around) > world. Can you provide a couple of examples of products that you bought based on the criterion of color-blind-friendliness? It would help me make a better argument during our future design/planning sessions. Thanks again, Vitaliy -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist