Yep.. the first line with these colours is just the Revell numbers of paints. So the staubgrau matt 77 is Revell 77 that is said to be an equivalent of Humbrol 79 Matt Blue-grey. The colour can be used as the RLM 66 for cockpit interiors although the Humbrol 67 is suggested. But taking the scale effect into consideration the lighter Revell 77/ Hu 79 seem to be a good choice .