Carl so happens i also just applied for a permit to repair and extend my deck and have been looking at these options i am not finding much locally in the way of color options, the colors you are looking for are available, but are special order,

Depot carries brown and gray at $33 bucks for 16' pieces, but the color you are looking for would be an extra $26 each, $59 per piece according to the pro desk, there is a lighter option at lowes that isn't horrible on price