It is rare that I need a color specific enough that I need to use the color wheel or any of the other views of the Color Picker. Most of the time I am happy with one of the 48 colors in the crayon box.
For such a small palette, the Color Picker has a huge number of options. For a much more thorough look at the Color Picker, check out this article from Robinwood.com.
(If it has been a few years since you've played with real crayons, check out all the different kinds they have now).