OK, looks like this is since last update to 2.0.18
The issue is that though I've set every possible style properly and haven't changed anything, most of the links on the test website are blue instead of gray. Double-checked all the settings, incl. in the database (where Helix stores all settings), then exported the .json and compared it with the .json from December - 100 % the same, no change. But somehow the links are overriden with no apparent reason for that. And the styles don't even contain such color now, yet it's still showing the links to be blue (with default font, as well).
Any ideas:
Thank you!