Linus fixing

[talavis]

• Fix missing alt texts
• Rename Elixir logo on bioinformatics page from nbis logo to elixir
• Increase contrast of links (maybe too much?)

[ewels]

Interesting! I always thought that empty alt attributes were a Bad Thing. I tried switching them so that they said the language name instead, but then I got a warning that the content was too similar to what was around it. Then I realised that the empty alt attribute was being flagged as a feature:

Why It Matters
If an image does not convey content or if the content of the image is conveyed elsewhere (such as in a caption or nearby text), the image should have empty/null alternative text (alt="") to ensure that it is ignored by a screen reader and is hidden when images are disabled or unavailable.

Cool!

[ewels]

I tweaked the link colour ever so slightly more after poking around the web a bit. In the end I took the link colour from the EBI site (which passes the test) and made it slightly lighter (still passing).

Ironically, I think that the default Bootstrap link colour actually has better contrast for most users - at least, between regular text and links. But I think that this colour is fine and hopefully works well for everyone.

[ewels]

LGTM!