I've used the Color Variations View in this nifty
program SE-ColorMaker, and found that three shades brighter than the current are way more visible in Dark Theme, here's what's in the "changed tones" screenshot:
("comment", "#00C700", False, True),
("string", "#B6B600", False, False),
("number", "#D96D00", False, False),
Before changes, not so visible: