>Traffic lights aren't an issue for the color blind, as their position is fixed.
>

I don't know where you drive, Mark, but we have many intersections with big banks of various numbers of lights for turns, etc., around here :)

>Another issue is this: what if the user (color-blind or not) has changed her system colors in such a way that this color-coding makes the text invisible?
>

That's happened to me back when I did my first large 2.5/6 app in 3.1. I got calls rather quickly from a couple users who had mostly blank screens on their monitors. Whoops! There was a blue on blue problem, I think, and the one I recall best was one woman that liked black window background, and of course labels and some text were fixed black in the app :) That's when the idea below dawned on me...

>Hmmm...I guess that doesn't apply, as VFP doesn't use system colors. :)

I allow users to use win system colors, and/or customize to their own "in-app" colors/fonts, which have individual settings for forms, labels, editable text, disabled text, read/write grid columns, pages, bold font, etc., so hopefully this covers all bases, and I can check and warn for conflicts :) After all this, and though some users really like it, with all these nice choices, others remain committed to boring gray, black, and white. Each to their own, I guess :)