Accessibility Fixes: Global Components and Pages

[willy1989cv]

Changes

• Global Sections and Components
  • Gray color contrast
  • ScrollIndicator empty button
  • Data 101 title and "go back to top" color contrast: changed from #54CA59 to #0E5D15. the least dark accepted
• Home
  • Topics card color contrast
• Datasets
  • Search missing form label
  • Dataset description color contrast: Darken the color. from #7C7C7C to #545454
  • Redundant alternative texts
  • Nearby images has the same alternative text
  • Developer experience theme changed to githubGist
• Dataset Detail Page
  • Share Link empty
  • Dataset info (created, updated, ...) color contrast: #787878 to #595959
  • Share, cite, rate color contrast
  • Dataset categories color contrast
  • Resource download, rows and columns color contrast
  • Images with same alt text
  • Multiple h2
• Build Your Data.
  • Data description color contrast
  • Select Missing Labels
  • Imgs with same alt text
  • Possible Heading

[demenech]

Review

IMO you should limit the height of the overlay so that it won't darken the whole image. I suggest making the overlay an absolutely positioned div with a bottom-to-top gradient.

Except for that and the conflict, LGTM.

[demenech]

lgtm