Accessibility issue on Polyglots Team locale page

[rollybueno]

The "Download WordPress in [Locale]" link is invisible due to poor text color and contrast. The white color on the light gray background is evidently not a very good combination.

The same thing happens in "Download language pack [WP VERSION]" on all team loacale page.

I have reported this issue where the download link in the Team's local page is not visible due to the white text and light gray background color combination. The reported track is below:

Trac: https://meta.trac.wordpress.org/ticket/7986

This happens on all Team's locale page

### What I changed

My patch removes the color: white; property on the #locale-header ul li.download-button a, which you can find in i18n-teams.css file.

### Result

[rollybueno]

Result when color property is removed:

[dd32]

Duplicate of #7916 Leaving this open for now.

[rollybueno]

Hey @dd32 - should I repatch to https://meta.trac.wordpress.org/ticket/7916 instead?

[dd32]

@rollybueno No, no need :) I'll likely merge this in today and close off all the related items.

[dd32]

In 14457:

WP I18N Teams: Update the team page styling with the newer block buttons.

Props dd32, dhrumilk, mikinc860, rollybueno.
Fixes #7916, #7986.
Closes ​https://github.com/WordPress/wordpress.org/pull/490.