Unfortunatly it seems that when it comes to the Powered assault armour and the shock trooper armour, Brickforge doesn't want to continue producing fun bright colours. With the PA armour they've already discontinued Orange, Pink, Purple, Medium Blue, Sand green, Yellow, and dark blue. Before you know it Red and Blue would've been removed. They claim it's because they aren't selling as well as other pieces. In my opinion just sos long as they ae selling is reason enough to keep producing. Just cause one piece is selling more than another isn't a reason the discontinue the later.
Who said those colors were discontinued? The only colors that have been officially discontinued from the BF palette are Brown, Dark Gray, and Sand Green. You are getting "sold out" confused with discontinued. There is a chance they will not come back in specific colors. People are always welcome to sponsor a color. PAC items may be selling well, however producing new items and the direction BF is going with screen printed items take priority over restocking some colors that are not as profitable. Before you know it, BF will have some awesome new products that will blow your mind......again.