YANBU. Very sensible I think.
My DD has a blue boys bike, she doesn't seem to mind. And my younger DS has a very very pink bike, which is DD's hand-me-down, and a pink scooter, he also doesn't mind. There is a biggish age gap between them, so when I bought a lot of DD's earlier stuff I hadn't been planning on handing it down.
DS's favourite shoes are a pair of his big sister's hot pink crocs, they have butterfly and flower charms on them. He wears them in all weather, and has a screeching fit if I ever take them off him, he also had a hissy fit when I 'lost' the charms. I think it's sweet that he likes them so much.
I remember I wanted to be a boy when I was younger. In hindsight I'm sure now I just wanted to be able to do boy stuff, as back then I remember my brother got to have a lot more fun in some ways than did as a girl. Thinking of Cubs and Brownies as an example, in the '80s Cub Scouts went camping, abseiling, canoeing, etc. Brownies did homekeeping, hostess badges, sewing, how unfair! I work in a very male dominated field, I feel I've been fighting gender norms all my life. My only regret is having my hair cut very short at one stage, I was probably about 9 y.o. and funnily enough I hated that some people thought I was a boy. It's fair to say I feel a bit conflicted about gender.