Is there a technical reason for the 200 reputation requirement?

I do support this suggestion, though, and hope to implement it in the future--I encourage any end user to feel free to make the change in their own instance of the script or similar if they are using it.

NB - I have paused work on any scripts or user styles for SO while the moderation strike is on-going.

@Pedro Yes you could do that by adding a new variable and using document.querySelectorAll() to select the div.js-vote-count element and then applying the style in my previous comment the same way I applied all the other styles (via .setAttribute()), for one example.

@Pedro Yes it is possible, although outside the scope of this script, which affects only the buttons (not the score). You can use a user style via a browser add-on (like Stylus) and use the style: div.js-vote-count { font-weight: 400 !important; } to restore it. (Note, it was bold before, just less bold (the new font-weight is 600 vs the old 400. Anything over 300 is considered "bold".)

@CodyGray Yes, it was the optical illusion of the color looking darker on a light background and lighter on a darker background. It has been fixed now.

That being said, do of course feel free to use a lighter value in your own copy of the script if that's the only thing you find issue with.

I did notice the darker color on light mode, I think that's a change on SO's side, since I think it's the a different color from what I applied while crafting it in dark mode (at least I think it is, I didn't confirm). The blue color hover is intentional for improving UX. These are both feature-requests rather than bugs, per se; I'll consider changing them. Considering the fact that SO's change of the styles in the first place is allegedly to comply with WCAG requirements, I'll probably check the contrast of the old vs the newer, darker buttons before changing them, as well.

I just noticed this does not apply to posts in /review. I will try to update it in the future so that it affects those, too.

@MMM The styles as currently written apply to other pages that they are not designed for if you do that; some things (like the rep history page on your profile) are negatively affected. The styles also don't currently work well with other network sites just by nature of me not comparing the styling there. That is why they only target SO's and MSO's /questions pages. YMMV applying them to other sites/pages as is.