I don't know about other people, but one thing bothers me for a long time, the "tick" sign in dark mode of the Groupy UI. It is SO HARD to tell whether a tick is checked or not.

Just look at the image I have uploaded.

The color of those ticks are too similar and the shape doesn't help differentiate them at all.

It is quite hard for user to know on the first look (or haven't see it for a while). Sometime we open the setting and we need to pay close attention to see whether that option have been checked or not, not a very convenient design. 

I think a tiny change in design can solve all the unnecessary confusion, for example switch the "tick" design to something like this (https://codepen.io/valerypatorius/full/oXGMGL) or like the image below.

Hope the dev team can improve on the design