ATT32245 (Clear decal paper) Jasta 65 grau-violet, paint on linen
Described as close to a "slate grey" I thought it unlikely that such a dull colour would be chosen over a slightly more nuanced hue. Sadly, no documentation is published of any findings during "U10"'s botched restoration to help us. It's current, restored finish impossible to judge from photos due to flash photography necessary to see it..
Various airfield pictures show "Seven Swabians" looking distinctly lighter than other machines of the unit and so I have gone for a darker variation here.