It mentions that on that one website that no longer sells their program about monitor color and such. Also if you print out a chart then the colors may not be accurate as not all printers are true to color either.
I sold a seedling (maybe last year) that was an extremely light pink; I would say it was a near white with a pink hue basically and the buyer emailed me before she bought it to see what color it actually was because on her monitor it was pink and on her daughters monitor it was yellow.