Not that i am a brown frak, but a nice dark metalic brown would go with the interior. Silvers met. grays would also be nice. I did a K10 short bed with red interior years back. I did a factory style two tone a dark strawberry red met. top and bottom with a medium / dark met. charcoal. At the break point I went 1/8" gray, 1/8" red, 1/4" gray, 1/4" red. On one side of the tail gate and on the back of both fenders I did a wooga wooga with the two 1/8" stripes.