Colors used in the Svelte docs are unusable for colorblind people

[kevinrenskers]

I was going through the Svelte 5 migration guide today, and it uses a diff format to show what's changed, like this:

These colors look the same to me. About eight percent of men are red/green colorblind, so it's not like it's only affecting a handful of people. Can other colors be used instead please? These are good colors, coming from SourceTree:

The added - and + also really help a lot.

The colors on GitHub are only slightly better than what the Svelte site uses. Please don't use those colors 😅

It would really help a LOT if the colors on the Svelte docs could be changed, because right now I am having an extremely hard time making sense of the migration guide and its diffs.

[kevinrenskers]

Ah, luckily the colors are much much better in light mode. For me this makes the docs usable.

Unusable:

Fine:

Still, it'd be nice if the dark mode colors would also be usable so I am not blinded when reading the docs 😅

[enBonnet]

I'm adding some screenshots to share how you should see this:

Colorblind	Colors

I used an extension to test this: https://addons.mozilla.org/en-US/firefox/addon/let-s-get-color-blind