Please include this option for e-ink display users:

Show label colors on color selection interface when commenting/annotating/drawing. This can be available via hover or tap-and-hold, but the easiest might by to just put the first letter (in a given language) of each color in its respective swatch box.

I like to read/annotate using an Android E Ink tablet with a monochrome display. I am too poor/cheap to purchase a color E Ink device, but I still need to change colors for highlighting and, therefore, be able to know what color I am changing to.

😉