Check for colorblind safe palettes

[katiejolly]

I don't have a clear idea at this point but I'm thinking:

• Use the colorblinding chrome addin to see what the palettes look like for different types of colorblindness
• Mark in a table in the readme whether or not a palette is safe for the main types of colorblindness

Open to other ideas, too.

[tungttnguyen]

Hi @katiejolly ! This is pretty cool package. I really like the vintage colors. May I suggest using colorblindcheck and colorblindr packages to check for colorblind-friendly palettes within this package?

[tungttnguyen]

This might be useful too: Evaluation of the new palette() for R

[apreshill]

Adding prismatic has some great functions for this: https://emilhvitfeldt.github.io/prismatic/reference/index.html#section-color-blindness-approximations