Mооnst@r
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I won't make a mistake; I can simply guess that brown represents dwarves based on the color. But if a person isn't very familiar with the game and doesn't have very good eyesight, they might get confused (I experienced this while playing with someone). Because a brown head on a brown background looks like an empty space compared to the others; this is especially noticeable when you're looking at it from the corner of your eye and the panel is out of focus. But these are just my personal preferences.
I can't provide an example of the "reset" button right now; there was one in a mod for the undead resurrection table, and it was a green button with a yellow skull.
Added 1 hour 4 minutes ago
The idea with the necromancer button is good. I just need to make the buttons fully functional, so they can be clicked like the "wheel" in the inventory. I also need to change the icons in the wheel itself, which I don't want to do. I'll leave it as is. Maybe someone else will take it on as a project.