Introducing more color to the Pebble pieces

Found myself missing color and just working with paint as I continue to create these pebble/sea glass small pieces. Trying to be ready for (hopefully) this year's  art fairs!

The bits and pieces are being glued to sturdy Canson "Oils or Acrylics" paper. I am painting colored backgrounds on a few (see examples on left and right). I'm a bit ambivalent about them, however the colored background did let me use white sea glass for the jellyfish. Sea glass along my local beach in scarce, and most of the few pieces of sea glass I've found have been white.
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What we do have a lot of along our shoreline is the yellow and rose quartz used in the middle picture with the cat and birds. To me, this piece has a bright feeling, thanks to both the pebble colors and the subject matter. It feels "springlike," and I am happy with the result.