The only configuration I could find the option on was building a Laramie Longhorn. I only tried building 8' bed with DRW, but it's there in only that trim level that I've found. Other trim levels offer the silver two-tone.
2016 Big Horn Hemi 4x4 w/ 3.21 Limited Slip
Bilstein 5100 at 2.1", Timbren SES, Airlift 1000, 18" Magnaflow, AEM Dryflow, 34" Falken Wildpeak AT3W, H9/9011 Headlight Upgrade, 7'6 Fisher HT, Bullet bedliner