I've had luck using a Behr Smart Color scanner on my phone. I scan it a few dozen times in different lights and different times of day. I go with the color match that comes up the most. Then go Home Depot and buy a sample. Last time I did it was with a red and the match blended perfectly.
New! Dark mode!
Browsing Pinside at night? Getting tired of all the white? Switch to dark mode using the button in the top right (or CTRL-B)!