Blue is one of three primary colours in painting.
I wasn't aware of that.  What are the other two primary colors?  I'm guessing yellow is one?
No it isnt, blue is just one of three colours, Red and Green are the others
I'm not a painter, never have been very artistic.  In fact, I had never thought about painting having primary colors.  I guess you can make a lot of different colors by combining those three in different variations.
I guess you could say that. Bet you didnt know that the eye perceives blue when observing light and its dominant wavelength being approximatley 450 and 495 nanometers?