Leftover Paint Colour acceptable for Room?

[Derek Larson]

So I overbought some paint about a year ago and have about 7 gallons leftover. Last year we moved residence and purchased a Lakehouse. I recently purchased a LTR and wondering if I can use some of this paint at it. Maybe a bedroom or two, or possibly the basement. The new rental is 3 bedroom 2 bath SFH. Of course I wouldn't mind saving the money, but also don't like being this wasteful. Plus it is good quality paint. It is a lighter blue color.

Thoughts on this or another plan for this paint?