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A dark bluish gray, white text passes AA

Tailwind zinc-700

The hex code of Tailwind zinc-700 is #3f3f46 (rgb(63 63 70)), from its Tailwind CSS 4.3.3 value oklch(37% 0.013 285.805). White text on it reaches 10.44:1, passing WCAG AAA; below, Recolor (recolor.page) puts it on a page.

Last updated

#3f3f46zinc-700
From the theme file of Tailwind CSS 4.3.3 (--color-zinc-700), converted with Recolor's color code, October 9, 2026
FormatValue
OKLCH, as Tailwind writes itoklch(37% 0.013 285.805)
Hex#3f3f46
RGBrgb(63 63 70)
HSLhsl(240 5% 26%)
CSS variablevar(--color-zinc-700)
Nearest CSS namedarkslategray #2f4f4f, 0.051 away in OKLab
White text10.44:1: AA passes, AAA passes, large text passes
Black text2.01:1: AA fails, AAA fails, large text fails

About zinc-700

Read as numbers, zinc-700 is lightness 37.0%, chroma 0.013 and hue 285.8 degrees; read by eye, it is a dark bluish gray. Its neighbors on the zinc scale are zinc-600, 7.2 points lighter, and zinc-800, 9.6 points darker.

HSL calls its lightness 26%, OKLCH 37.0%: 11 points between a formula and a measure of what the eye sees. No gamut mapping is needed here: oklch(37% 0.013 285.805) sits inside sRGB and #3f3f46 matches it.

White on zinc-700 reads at 10.44:1, enough for AAA body text; black reaches 2.01:1 and should stay off it. White text passes on every zinc shade from zinc-500 down, so zinc-700 is 2 shades past the line.

The nearest CSS named color, darkslategray (#2f4f4f), is 0.051 away in OKLab: related, but plainly a different color.

Tints and shades

  1. #dddcdc
  2. #bdb9ba
  3. #9d989a
  4. #7f787a
  5. #615a5c
  6. #3f3f46
  7. #342e30
  8. #241f21
  9. #151213
  10. #070606
  11. #010101

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. #3f3f46
  2. #9dd2d3
  3. #002f32
  4. #0094a2
  5. #b4f1f5

Around zinc-700 as swatch 1, Recolor's generator made a monochromatic palette, one hue in five lightnesses: #9dd2d3, #002f32, #0094a2, #b4f1f5, drawn from a seed fixed by its hex. Open it in Recolor.

Using zinc-700

Pair it with text-white, 10.44:1; zinc-700 as text on a white page measures the same ratio. In CSS it is var(--color-zinc-700).

HTML
<a class="bg-zinc-700 text-white" href="/start">Get started</a>
<p class="text-zinc-700">Text in zinc-700</p>

Common questions

Does white text pass WCAG AA on Tailwind zinc-700?

Yes. White text measures 10.44:1 on zinc-700, above the 4.5:1 that WCAG AA asks of body text, and above AAA's 7:1 too.

Is Tailwind zinc-700 defined in OKLCH?

Yes. Tailwind CSS 4.3.3 defines it as --color-zinc-700: oklch(37% 0.013 285.805); #3f3f46 is its conversion to sRGB.

Is there a CSS named color for Tailwind zinc-700?

No. The nearest CSS named color is darkslategray (#2f4f4f), 0.051 away in OKLab.

Sources