Scheme Colour name FS-number BS-number Humbrol XtraColor Vallejo Model Color Vallejo Model AirHataka
Standard #1 Overall Light grey ~6440 ??;   129 X137 70.986 71.121~048
Upper surfaces wings and engine cowling Dark grey ~6118?   112 / 156 ?  70.868 71.053 ~031

Check www.paint4models.com for an extensive conversion table with lots of colour and paint systems.

Rumpler 6B2-1-SMALL
Rumpler 6B-2, U-1.