Rokkit Boyz don't have much in the way of armour. But what armour they do have is yellow. Lot of fabric on these models, so I gave them lots of check patterns for a bit of interest. When everything's painted and on the table, the heavy checking should differentiate them nicely, but remain coherent in the army.
This unit also features a sneaky Death Skull, as a little tribute to Warbringer who has spent the last two weeks saying "you're painting things yellow, but blue are the best orks".