Grey text in Tips & Notes is hard to read
The Russian for English speakers course has a lot of good detailed information under the lessons. I don't get very good contrast between the grey text and white background so I'm squinting at the cyrillic. Sometimes it's easier to copy and paste it out into a text editor.
Maybe it's just my screen... but it would be nice for everyone if it was just ordinary black text. Is that something that could happen?
Often wanted, but Duolingo doesn't listen. They don't care about users with vision problems. (Of course they never said that outright, but that is my experience.)
You should ask a moderator, but I can read the tips and notes without any problem;-)