Well, many people's cars have the two tone parchment interior.
I was thinking about getting some leather dye and making the seats two tone, also making the dash a bit more two toned (reversing some colors for fan bezels, grills, etc.
Let me know what you guys think.

 

personally I like the monochromatic seats better, but if you wanted to do a non-factory color scheme it woul dbe unique, just choose your clors wisely.

 

Be careful what kind of dyes you use. It might not come out looking as good as you had hoped for.