I can tell usually what looks good on a woman..style of dress, shirt ..more based on fit cues but totally clueless on colors or any accessory such as shoes, purses or jewelery. I do know tennis shoes don't fit with an evening gown but that is the extent of it.
Yeah, the fit is what most guys notice, LOL.
But hey, at least you know about the sneakers and evening gown...I think some women are wearing flip flops with them now.