I need to touch up paint in a large room. I cut a chip out of the wall and brought it to a box store, which color-matched it. I didn't watch them match it so I don't know which method they used.
The color they produced looked right when they dabbed it on the paint chip in the store, but when I went back and put it on the walls, it clearly didn't match. It was not quite the same color and looks blotchy, even after drying fully. The problem was not the sheen, but the color.
My question is: Does matching paint colors sometimes just not work, and I need to give up and repaint the whole room? Or should I try going back to the store (or maybe try a different store) and ask them to match again? Is there anything else I can do at the store to help ensure they match accurately?