For my 100 days this year, I am digging into learning more about colour. I feel that in 100 days that I won't even scratch the surface. I will concentrate on fabrics and stitch, with a bit of paint if I find myself falling behind.
My sister (the science teacher) had suggestions that dealt with light, rods, cones and other sciency things. I then started thinking about colour in terms of emotions and how one reacts to various colours. My sister in law is an optometrist. I imagine she would have a different view on how I should approach my colour study! 100 days is certainly not enough.
For now, I have a brief outline of things I want to learn, with a bullet journal to cross off the days.
And a colour wheel. That is a good place to begin.