I love shoes and have a fairly good collection. If I had to pick one pair for general purposes, it would be a pair of black low heels. Black goes with about just about anything. Nude is second. I have two go-to pairs of shoes I wear about 50% of the time, one black, one nude.
Your question caused me to think about the order I would add colors to a collection, and it is probably this:
1.Black 2.Nude 3.Brown 4.Navy 5.Red/Burgundy 6.White
To me, white is pretty specific for certain outfits and not as much a general choice. Others may disagree. After those basics, I would (and have) buy shoes to go with specific outfits. I have silver slings, low fuchsia heels, high canary yellow heels and pink open toes, but they see service only with one or two outfits. I think you’ll find shoes are like Pringles. You can’t stop at one.