[Firebirdjones]

My blazer is also orange, and I like the white vinyl with orange houndstooth that I installed (originally white with orange highlander). Nice and cool in the summer.

Since you don't want white or black,,,and your blazer is orange,,,the only other color that comes to mind that would look classy is a light tan or beige on the vinyl,,,would look nice against the orange exterior color. I see that on alot of street rods, it's a good looking combo. Not much else really goes with an orange exterior and looks good.
Not sure what to go with on the cloth inserts though if you prefered those.