The underwear reminded me of my mom. She always insisted on buying me plain white cotton undies in the six pack full brief style. Because you can bleach them! (women loves her bleach, bleach can clean anything, kill all bugs, and must be used) She also bought me plain, complete coverage, wire-free bras. Cause you can bleach them! And they're comfortable.
Before I started 7th grade I got word that my new school required "dressing out" for gym for 7th and 8th graders. I was going to be standing in a room of other girls in my plain white cotton underthings (that smelled like bleach). Oh no, no way. I started with the bras, because I really did need some under wire. Still white, but leaps and bounds better then what I had. Then I started slowly putting undies in the cart that had a few colored/patterned pair, then it was all colors, then hipster style. Still couldn't get anything but the 6 pack cotton, and she still complained they weren't "bleach-able", I was excited when I started working and could buy whatever I wanted.
I don't own a single pair of white underwear. I also don't wear white pants cause I've met me and I'd get them very dirty very fast. So it's a non-issue.