This is a classic, but it's not for the faint of heart. Flameworkers either love it or hate it since it tends to be fussy. Work it right and it sings! I recommend clear as your base. The yellow green color is transparent and falls to the background. The opaque purple comes to the foreground and they combine perfectly. You don't want to layer this color since the transparent over the opaque can cause some color shifts that are less then pure. Work it cool and not in a sustained high heat. It looks great on its own or as a base to florals and other patterns.