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A vivid dark green, white text passes AA

Tailwind green-900

The hex code of Tailwind green-900 is #0d542b (rgb(13 84 43)), from its Tailwind CSS 4.3.3 value oklch(39.3% 0.095 152.535). White text on it reaches 9.05:1, passing WCAG AAA; below, Recolor (recolor.page) puts it on a page.

Last updated

#0d542bgreen-900
From the theme file of Tailwind CSS 4.3.3 (--color-green-900), converted with Recolor's color code, October 9, 2026
FormatValue
OKLCH, as Tailwind writes itoklch(39.3% 0.095 152.535)
Hex#0d542b
RGBrgb(13 84 43)
HSLhsl(145 73% 19%)
CSS variablevar(--color-green-900)
Nearest CSS namedarkgreen #006400, 0.071 away in OKLab
White text9.05:1: AA passes, AAA passes, large text passes
Black text2.32:1: AA fails, AAA fails, large text fails

About green-900

Read as numbers, green-900 is lightness 39.3%, chroma 0.095 and hue 152.5 degrees; read by eye, it is a vivid dark green. Its neighbors on the green scale are green-800, 5.5 points lighter, and green-950, 12.7 points darker.

HSL puts its lightness at 19% and OKLCH at 39.3%, 20 points apart: HSL's lightness does not follow what the eye sees, OKLCH's is built to. No gamut mapping is needed here: oklch(39.3% 0.095 152.535) sits inside sRGB and #0d542b matches it.

White on green-900 reads at 9.05:1, enough for AAA body text; black reaches 2.32:1 and should stay off it. White text passes on every green shade from green-700 down, so green-900 is 2 shades past the line.

The nearest CSS named color, darkgreen (#006400), is 0.071 away in OKLab: related, but plainly a different color.

Tints and shades

  1. #d6e1d9
  2. #afc3b3
  3. #88a68f
  4. #628a6c
  5. #3c6f4b
  6. #0d542b
  7. #08401f
  8. #042d14
  9. #021b0a
  10. #000b03
  11. #000100

From light to dark: 5 toward white and 5 toward black, mixed in OKLCH a sixth of the way at a time with the hue kept. A step that would repeat its neighbor is left out.

A palette around it

  1. #0d542b
  2. #b1beff
  3. #211713
  4. #6c7cce
  5. #c3f1d2

Around green-900 as swatch 1, Recolor's generator made a triadic palette, three hues a third of the wheel apart: #b1beff, #211713, #6c7cce, #c3f1d2, drawn from a seed fixed by its hex. Open it in Recolor.

Using green-900

Pair it with text-white, 9.05:1; green-900 as text on a white page measures the same ratio. In CSS it is var(--color-green-900).

HTML
<a class="bg-green-900 text-white" href="/start">Get started</a>
<p class="text-green-900">Text in green-900</p>

Common questions

Does white text pass WCAG AA on Tailwind green-900?

Yes. White text measures 9.05:1 on green-900, above the 4.5:1 that WCAG AA asks of body text, and above AAA's 7:1 too.

Is Tailwind green-900 defined in OKLCH?

Yes. Tailwind CSS 4.3.3 defines it as --color-green-900: oklch(39.3% 0.095 152.535); #0d542b is its conversion to sRGB.

Is there a CSS named color for Tailwind green-900?

No. The nearest CSS named color is darkgreen (#006400), 0.071 away in OKLab.

Sources