I recently purchased some Double Helix silver glass from Franz Glass and I've been experimenting with the colors. One idea I found as a free tutorial on Lampwork, Etc. It's listed as fire opal but it reminds me more of creamy caramel. You make a base bead out of black, wrap silver foil around it, burning off the edges but leaving the band intact. Then you heat a rod of Ekho and when the tip is transparent you, you lay down one or two swirls of the glass around the bead, then encase with clear.
In addition to using black as my base bead, I tried butter pecan (CIM 703), shown in the middle, and honey crunch (Vetrofond 990), shown at the end. I think I prefer the lighter background, They look good enough to eat!