I love the color blue from its palest hue to navy/indigo.
Oh nice. Blue is my favorite color too. I'm glad I'm not color blind. 
Yes colorblindness can make educational activities difficult.
How many shades of blue are there?
Blue
Blue is one of the three primary colours of pigments in painting and traditional colour theory, as well as in the RGB colour model. It lies between violet and green on the spectrum of visible light. The eye perceives blue when observing light with a dominant wavelength between approximately 450 and 495 nanometres. Most blues contain a slight mixture of other colours; azure contains some green, while ultramarine contains some violet. The clear daytime sky and the deep sea appear blue because of an optical effect known as Rayleigh scattering.
use of adjectives (e.g. "light brown", "sea green") or compounded basic color words (e.g. "yellow-green").
In natural languages Color dimensions.
There are many different dimensions by which color varies. For example, hue (shades of red, orange, yellow, green, blue, and purple), saturation ("deep" vs. "pale"), and brightness or intensity make up the HSI color space. The adjective "fluorescent" in English refers to moderately high