Does it do any good to have black on the interior of UQ or TQ
Generally at least one side is black to assist with drying out in the sunlight on multiday trips.
Have sherpas, will travel...
Triangles, it's all about the triangles.
Also usually companies will order bigger batches of black and grey, so it cuts cost... And plus what the other guys say... I will say this, I have the Moroccan blue and the black inside on my UGQ, and it is REALLY hard to see the difference with a red head lamp on when trying to get in the top quilt...
Live, Laugh, Love, if that doesn't work. Load, Aim and Fire, repeat as necessary...
Buy, Try, Learn, Repeat
I like black on black, it makes me THINK it doesn't get as dirty.
Really does help too. Even when the quilt is "dry", there is still condensed moisture within. This is especially true as the temp drops. Condensation in the outside layers will not be noticeable to the casual user but it can build up over time. Thus when many talk about no condensation, they usually mean not noticeable because it was actually within their insulation. No big deal on a 1 or 2 night trip, but when you start getting into a week or more, this can become a significant issue.