What are the best colors for in-sky visibility (up and down)?

What colors have you found are the best for in-sky visibility at long range?

I have a Mavic Pro that I'm planning to get skins for to improve in-sky visibility, and I'm interested in what actually works for long distance visibility.

The dark grey is reasonably visible, but I'd like something a bit more obvious if possible. And I don't care that much if it looks a bit funky.

From the ground, I'm looking up against a typically blue sky (if it's cloudy, it's often not flying weather out here), and I wouldn't mind something that's more visible from above against brown or green earth (for visibility from overflying aircraft).

Suggestions? Thanks!