I am a longarmer and I don't use many different colors.
I use 4 different colors of grey, camel, light tan and natural the most often on quilts especially scrap quilts. I was so happy last week to get to use yellow. I do match the top and bobbin thread.
If there is not a thread that matches my patchwork or one that will do for all patches, I am back to those colors I quilt with