Message text color not applying

[grugnog]

Thanks for working on this project :)

As of a recent Slack change regular message text is showing up as dark grey, which is pretty unreadable on the dark blue Solarized background. I am guessing some of the class names have changed - I poked around to see if I could figure out which, but didn't make much progress - I am hoping you might be more familiar with the Slack DOM to be able to notice what the change is!