Working through this … our letter avatar service already allows for color to be specified:
https://avatars.discourse.org/v3/letter/m/ff0000/64.png
https://avatars.discourse.org/v3/letter/m/00ff00/64.png
https://avatars.discourse.org/v3/letter/m/0000ff/64.png
I am warm to a site setting that lets you restrict this, seems like the simplest thing to do here vs defining custom color palettes.
restrict_letter_avatar_colors : aa00aa,bbccdd,332244
If set only pick letter avatars from the restricted list.
@maja can you add this to your list?
Clearly the default is just to work as we do today, but if people define colors in the settings then we would only use a subset.