For those who don't remember, here's the colour description: Spanish Fly - warm brown overlaid with a silver-green iridescence.
It's a colour that I always loved in the tube, but I could never make it work like I wanted it to on me.
I don't really remember what I had tried with it and B2Md it a long time ago. If I had to guess, I would say that any pink LG would help to cancel out the green. A Lustreglass might be good as it would be slightly see through so the Spanish Fly would still show through a bit. Have you tried Flashmode or Pink Karat Lustreglass over it?