The visible light spectrum goes between blue and red; hence Emergency vehicle lights are these colors. As I understand it, typical color blindness affects a narrow band of color. So, like EMS lights, sight colors are at (nearly; green is next to blue) the opposite end of the visible spectrum. I suppose blue might be too dark to easily pick up???
So, if you strongly lean one way, you may have a little color blindness in the opposite spectrum. Or, if not, you can use either.
Anyone here know more on this? I’d be very interested in learning more. Thanks👍🏻