I would call the specific store where you bought it from and ask. Also don't forget to ask for the name of the person you spoke to. Custom mixes are most likely not returnable.
Custom mix no but regular they may.Call an ask all they can say is no.save it as touch up.
Custom mixed no, off the shelf, yes
Most will not
If it's not a special mix
Usually no, but worth a call to ask!
You can try. Home Depot wouldn't take it back.
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