I like black, and when I was looking at vehicles last year, seems everything was tan or beige.
I like dark interiors, seems easier on the eyes. as for being hotter, it is not any different by more than a degree or two.
A few years ago there were 4 of us at the same station that had almost identical trucks (1998-2001 Dodge Ram 1500).
I had a black exterior/black interior truck, with the others being dark blue/tan, white/tan and white/black.
We put thermometers in the trucks to compare temps through the day (and did it several times when we were all there), and the temps inside were all within range of each other.
What did make a difference (short term) was getting a good window tint with UV protection and using a reflective windshield block, but by about 4 pm, all the vehicles were the same temp regardless.