No, it's a regular (European) Scart RGB input. The b/w image (when reducing the TVs overall color intensity) via RGB input is ok, also FBAS/Composite signal works fine at this input.
What is strange, the DigiSat receiver's RGB signal looks great and it appears to be real RGB. You can select different output modes from the receiver's menue and there's a notable difference between FBAS and RGB. It's hooked up via a scart-to-scart cable with all the cable's pins connected, there aren't any resistors in this cable.
But as I wrote, all my other consoles display an odd picture when hooked up via RGB.