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Dark mode for NASA in Safari

Cameleon recolours NASA in Safari with one of five skins, three dark and two light, and changes nothing but colour. In NASA's own colours, 12 of the 117 pieces of text measured are under WCAG AA contrast; under each of the five skins, every one of them passes.

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NASA in each skin

NASA's page in its own colours
12 of 117 pieces of text are under WCAG AA contrast. Median contrast 17.88:1.
NASA's page recoloured by Cameleon's Midnight skin
All 117 pieces of text clear WCAG AA contrast. Median contrast 11.03:1.
NASA's page recoloured by Cameleon's Dusk skin
All 121 pieces of text clear WCAG AA contrast. Median contrast 12.59:1.
NASA's page recoloured by Cameleon's Legacy skin
All 117 pieces of text clear WCAG AA contrast. Median contrast 10.28:1.
NASA's page recoloured by Cameleon's Sunset skin
All 117 pieces of text clear WCAG AA contrast. Median contrast 10.92:1.
NASA's page recoloured by Cameleon's Yardage Book skin
All 117 pieces of text clear WCAG AA contrast. Median contrast 7.61:1.

Captured and measured 3 November 2026 with Cameleon's own engine, on the real page. How it was measured.

What NASA offers by itself

With the Mac set to dark appearance, the page was dark.

What Cameleon does on NASA

  • When NASA is already dark, a dark skin stands back and leaves its own colours on the page, because two dark themes fighting read worse than one. Choose a skin for NASA itself and it applies anyway.
  • When your Mac is light, NASA keeps its own colours unless you set a skin for light appearance, or choose one for NASA.
  • A light skin, Sunset or Yardage Book, always goes ahead on NASA, dark or not.
  • Choose a skin on NASA and it is remembered for NASA; other sites keep theirs.
  • Colour only: the layout, the text and the links stay as NASA made them.

The contrast, before and after

ColoursText under WCAG AAMedian contrast
NASA's own12 of 11717.88:1
Midnight0 of 11711.03:1
Dusk0 of 12112.59:1
Legacy0 of 11710.28:1
Sunset0 of 11710.92:1
Yardage Book0 of 1177.61:1

Measured 3 November 2026 on the page shown, a public one read without signing in, with Cameleon's own engine. A further 12 pieces of text sit on a background image rather than a colour, which is painted over the colour beneath it, so they are counted as not measurable rather than scored. WCAG AA is 4.5:1 for text and 3:1 for large text. How it was measured, and what it cannot fix.

NASA belongs to its owner, who has nothing to do with Cameleon. The captures show its public page, to show the colours.

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