Anyone else experience this??

I’ve been with my husband for 7yrs. Sex is great. Last night was nothing special.. honestly we just did the bare minimum because we were both tired 😂 the orgasm was still AMAZING.. and for the first time ever (didn’t even know this was a thing) when I orgasmed I was seeing colors??? Mostly purple. I am beyond fascinated with it now & I really hope it’s something that keeps happening 😂 *also, no drugs are/were involved* 🤣