I uh, probably wouldn't think twice about it to be honest. I don't know if it applies to all guys but I might notice you were wearing red nail polish, maybe. I probably wouldn't think any further than that, like about WHY you wore red nail polish or whether it's romantic.
If I thought about that for every little thing it would be absolutely exhausting, lol
I have a thing for nail polish but most guys don't notice or care much about it. I guess that red is a sign of romance so wear it if you want. You should be wearing polish or whatever else for yourself rather than for others.