Don’t think the XC loop colours are an indicator of difficulty.
The Les Gets Black XC is pretty easy most of the way around.
The Mont Chery red XC was rather good (bit of a drag at the start but then the best bit appears). Nice restaurant too at the end of the ridge, just at the point where you’d start looping round the back. And another cafe where you’ll meet all the roadies/bikers half way round the back.
Went back and did that one twice but a bit more singletracky variation round the back. Bit narrow in places, with lots of steep switchback, and no berminess.
Panoramique + Serpentine in Chatel were fun (and we survived on HT).
Have GPX if anyone needs them.