Depends on how formal, how "sexy" etc. the dress is.
For example, this dress comes in red--I would wear it out to dinner, to church, and just generally "around town."
http://www.garnethill.com/modern-merino-sweater-dress/womens-fashion/dresses/216513
I actually almost bought it a few weeks ago (still considering it) and I planned to wear it on date nights with Dh or even on days I just wanted to look nicer than my typical "jeans and t shirts" (I am a Sahm)
Do you have a specific red dress in mind? Post a pic and we can give better opinions!
