I wear flip flops a lot (I'm in Florida & teach a lot of water aerobics, Pilates, Yoga) so I try to get my flip flop colors to match my Balenciaga bags
I'm just this way too. I will wear say, a black leather jacket, brown boots, brown bag, brown belt. If the hardware on the bag is brass/goldtone then so are my earrings, bracelet. Same w/ silver. I can't stand to have hardware mismatched.
I even have leather jackets to match shoes/bag. It's crazy I know. I'm a Virgo....we're so damned orderly...