Hey there, Brad! How are you formatting these background colors, as a word (ie 'hot pink'), hex, or RGB code? I'm wondering if specifying the opacity with an RBG code would make the different column types uniform.
I am using hex codes stored in the table "#ff66ff". I tested it and if I use RGBA, it works. Now I notice the the selection highlight changes the background color hue. Not unexpected in hindsight. Hmm, I may have to entirely rethink my UX on this.
Maybe I should add a feature request to have an unaltered method for displaying color in a table cell.