Not sure if this fully constitutes as a bug, but I've noticed that the little role icons on the colonist bar for ideologies are scaled rather poorly, and it makes distinguishing them rather difficult.
The following screenshot was taken at 1080p resolution, with UI scaling at default/1x.
You can see scale artifacting because the role icons are being shrunk down to fit.
I feel like these could be slightly increased in size on the colonist bar to reduce the artifacts, or even be reworked for the colonist bar entirely.