I'm not sure how it is with you, but I often find with me that things have a tendency to flow from one project into the next, taking the influences and hints from the previous train of thought... especially with colors. I don't necessarily think that this is something that I intentionally do, but something that I notice only after the fact. Some time ago, I realized that I seem to work in color clusters, and that one inspiration color that I'm feeling at the time gets carried over.
For instance, there's my "jewel-colors phase"... it all started with "Jeweled Kaleidoscope", which influenced the fabric selection for my bee block quilt, which spilled over into a mini quilt that came to being...