Kelli we've actually mixed paint from the same paint line but other colors and had great results. Ivory can mitigate lots of colors. You just need to make enough for your project because it can be hard to replicate unless you are measuring. Also let a paint sample dry on the wall before you judge it. Your FIL's thoughtfulness behind the gift offsets the colors...he gets what you're trying to do frugal wise...Bravo!