Source: WowAce

It's a small issue, but due to using a UI package my toast is black and since the text for attempts is also black it doesn't show up at all. Would it be possible to add an option for changing font color? I've tried looking in the code but can't seem to find where to do it myself.

The particular text this user is referring to, "Obtained after X attempts" on the achievement toast, can have it's colors modified by setting unlocked:SetTextColor(r, g, b) in GUI.lua \ RarityAchievementAlertFrame_SetUp(frame, itemId, attempts). I can add a setting for this using a color-picker or something similar, but I haven't because small settings like these will probably just clutter the Options at the moment.
Maybe an advanced settings options would be something to consider? I'm sure there could be several tiny changes like this implemented if there is a need for them.

The Options are already cluttered, but we can always add more tabs (Edit: I mean groups, not actual tabs). I already added one for experimental settings (called "Advanced", for now), we could easily add one for Customization options if there are features that could be grouped under it.

Realistically, the options UI could use an overhaul, but one step at a time.