Blue = good, red = bad makes sense to me. I assume Reddit went that way because of their branding, I personally think it's nice that it's exactly the opposite of Reddit. I say let it stay!
I'd love the option to choose different colors for votes, but please don't try to force Lemmy to be like Reddit. I came here specifically to avoid Reddit.
Yup, I've been using Lemmy religiously for days now and the voting colours still irks me. An option to change their appearance would be wonderful. Funnily enough I think originally subreddits like mildly infuriating did the same to, you know, infuriate the users.