As I grow wiser I noticed that I start having some difficulty seeing certain things, including the 1pixel curves drawn on a light gray backdrop.
for my pop-on/off ‘editing palette’ I manually repainted each of those white lines as gray, and my life is much better now. See the difference, comparing to the same icons in the default toolbars:
I think this should be consider a default to improve everyone’s lives as much as mine.
Let me know if you want to use mine, I’ve done it obsessively well, with full transparency support.