About
blue is:
- a hue color (chromatic)
- one of the percepted human colors.
- is used as primary color:
- coordinate in a colorspace (for instance the rgb colorspace)
- in a rgb wheel
- located at 450 nm on the visual spectrum
- before violet on the visual spectrum
- after cyan on the visual spectrum
- one of the lowest wavelength on the visual spectrum (has therefore a lot of dispersion and this is why the sky is blue/violet)
- located at 240 degree in a rgb additive color wheel
- used mostly in a additive color model - ie with light (screen, monitor,…) and not with pigment (painting, printing, inking)
- coupled with this emotions: calm, trust, competence, peace, logic, reliability
- is a cool color
The complementary color of blue is yellow.
