The same goes for EQs, Inserts or Sends when they are collapsed. Right now there's no feedback on whether there's anything activated on the channel. Green letters could indicate that there's an EQ activated, an effect inserted in the insert slot, or a send level greater than 0 for send FX. This goes, of course, both for the drum mixer and the main mixer.
There's a small graphic inconsistency in the mixer - the EQ is written in white, while Inserts ans Sends are gray (in the screenshot I changed this).

