If you were gonna buy 4 plain t shirts which colors would you get?

Idk, depends on what I'd plan with them. If I wanted to paint on them, then white or pale green or whatever color would fit my idea. If straight for wearing then all black, maybe some grey.

Sky blue
Navy blue
Violet/purple
Light brown/tan
Green Olive

Black, lilac, moss green, dark green.

Black, blue, grey, green.

Navy, aquamarine, green, black

white. white, white and white

White of course.

Plaid

Black