Color Blindness and HP Prime keys color choice

[Curlytop]

(03-05-2014 07:50 PM)Ben Fairbank Wrote:  My education included a lot of study of human vision, and one of the solidly established bedrock observations of visual researchers (specifically, sensory psychophysiology) is that for a contour to be usefully visible, there must be a brightness (or luminance) difference between visual stimuli on the two sides of the contour. A mere color (wavelength) difference is not sufficient to sustain a contour.

I think you`ve hit the nail on the head there. The orange ("gold") letters on a white or grey ("silver") background, violate the Rule of Tinctures which ensure good contrast in heraldry - and elsewhere e.g. road signs.