I think my MIL's plan was "if in doubt wear blue" because that's what she did, even though she told me beforehand she didn't like the dress she'd bought because she looked "grannyish" in it. (SIL sweetly told her she was old enough to be a gran so she may as well look like it.)
Why she couldn't have just bought a dress she liked I have no idea.
My mother wore jade green. She'd have hated to wear pink.