Color is Personal

I have been working on creating some holiday cards to have available for my patrons at work this week. I remember distinctly that one patron who looked through my cards last year saying " I don't buy Christmas cards that are blue. I like them to be red, green, gold, etc. but not blue. I don't relay to blue as a Christmas color." It was a comment that challenged me away from making too many blue cards which is what I seem to relate to. I feel that angels should be in a blue background. The sky looks bluer in the winter after a snowfall. The night with stars is blue. The shadows on the snow appear blue. So my personal preference seems to be to use blue. I cannot explain why that is. But to my surprise this same patron chose my cards with blue this year. She could not explain it to me. Is she evolving a new taste in color???