Blue is one of the three primary colours of pigments in painting and traditional colour 
Cool, blue is actually my favorite color.
Why is blue your favorite color ,any special reason?
I have just liked it since I was a kid.
If you observe closely,eye perceives blue when observing light with a dominant wavelength between approximately 450 and 495 nanometres.Those are scientific anyway
Huh, cool. Wavelength creating color for us is really interesting,
Interestingly, Most blues contain a slight mixture of other colors; azure contains some green