Black can be a difficult color for a lot of people. Getting decent contrast can be a challenge as there never seems to be enough variety to see lots of differences. I like to think about it as more of a background than a focus color. I do enjoy how other colors pop against a dark background though. This is a crumb quilt that I made a few years ago that was supposed to have an Amish feel. It went somewhere else though during the process though.
Have you started to ponder your dark scraps yet? Don't be afraid to try, after all, they were only scraps to begin with.