Dark purple, hands down, before I even looked at others choice.

Dark purple here too.

Another vote for dark purple.

i vote for the dark purple

Dark purple as the primary binding

consider using the gold as an accent doing Charisma's flanged binding method - it will give you a thin "bead" of gold against the dark purple and would be gorgeous!

Here's one I did with a darker gold main binding and a burgundy accent

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And here is a dark green print with purple

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Another vote for dark purple, for both being a nice frame for the quilt and for showing dirt less. I think having a flange of light purple might look really nice.

I agree with Iceblossom on the Gold. However my preference is a dark purple for the binding if not the gold. Solid colors no matter what. You want to make a statement about your quilt.

Another vote for dark purple.

Dark purple. It will frame the quilt nicely.

Dark purple for me too.