Tailwind CSS v3 color

Tailwind zinc-700 #3F3F46

Tailwind CSS v3's zinc-700 is #3F3F46. It is a dark gray in the neutral family. In OKLCH it sits at lightness 0.370 with chroma 0.012, too low for hue to matter. The nearest CSS named color is dimgray (#696969), ΔE2000 15.2 away.

Relative luminance
0.0505
OKLCH L · C · h
0.370 · 0.012 · 285.8
Best text
White 10.44:1
Hue family
Neutral
Inspect this color Check contrast

#3F3F46 color codes

HEX
#3F3F46
RGB
rgb(63, 63, 70)
HSL
hsl(240, 5%, 26%)
OKLCH
oklch(0.370 0.012 285.8)
OKLab
oklab(0.370 0.003 -0.011)
CIELAB (D65)
L* 26.89, a* 1.64, b* -4.26
XYZ (D65)
X 4.93, Y 5.05, Z 6.51
CMYK (naive)
cmyk(10%, 10%, 0%, 73%)

CIELAB and XYZ use the D65 white point; CSS lab() uses D50, so paste the OKLCH or HEX value into stylesheets. CMYK here is a plain formula with no press profile.

Legibility

Contrast: is #3F3F46 accessible?

White text on it reaches 10.44:1, passing AAA. Black text fails at 2.01:1.

WCAG 2 gives the same ratio whichever color is the text; APCA does not, so its Lc changes sign and size with polarity.

Open the Contrast System

  • Black text on it

    2.01:1

    • AA fails
    • AA large fails
    • AAA fails
    • APCA Lc +9

  • White text on it

    10.44:1

    • AA passes
    • AA large passes
    • AAA passes
    • APCA Lc −98

  • As text on black

    2.01:1

    • AA fails
    • AA large fails
    • AAA fails
    • APCA Lc −8

  • As text on white

    10.44:1

    • AA passes
    • AA large passes
    • AAA passes
    • APCA Lc +94

Nearest versions that pass 4.5:1

  • For text on white

    #3F3F46 10.44:1

    It already reaches 10.44:1 on white, so no change is needed.

  • For text on black

    #74747B 4.52:1

    Lightening its OKLCH lightness from 0.37 to 0.56 reaches 4.52:1 on black, keeping the hue.

    Compare both in the Contrast System

Checking another pair? Use the Contrast Checker.

Studio

Adjust #3F3F46 live

Move lightness, chroma and hue in OKLCH, or drag on the map. The map is every lightness and chroma at the current hue: sRGB inside the solid area, Display P3 out to the dashed line.

The studio needs JavaScript.

Scale

Shades and tints of #3F3F46

Eleven OKLCH lightness steps at this hue, each with its contrast against white and black. #3F3F46 sits at step 800.

  1. 50#F4F4FB
    White
    1.09
    Black
    19.17
  2. 100#EAEAF2
    White
    1.19
    Black
    17.54
  3. 200#D6D7DE
    White
    1.43
    Black
    14.63
  4. 300#BDBDC5
    White
    1.86
    Black
    11.24
  5. 400#A0A1A9
    White
    2.57
    Black
    8.16
  6. 500#85858D
    White
    3.66
    Black
    5.73
  7. 600#6E6E75
    White
    5.05
    Black
    4.15
  8. 700#57575E
    White
    7.16
    Black
    2.93
  9. 800This color#3F3F46
    White
    10.44
    Black
    2.01
  10. 900#28282E
    White
    14.65
    Black
    1.43
  11. 950#16151A
    White
    18.16
    Black
    1.15

Under each step, white and black text on it; a bold figure passes 4.5:1.

Tailwind CSS v3 zinc scale

The real Tailwind palette, for comparison with the computed ramp above.

  1. 50#FAFAFA
    White
    1.04
    Black
    20.11
  2. 100#F4F4F5
    White
    1.09
    Black
    19.10
  3. 200#E4E4E7
    White
    1.26
    Black
    16.55
  4. 300#D4D4D8
    White
    1.47
    Black
    14.20
  5. 400#A1A1AA
    White
    2.56
    Black
    8.19
  6. 500#71717A
    White
    4.83
    Black
    4.34
  7. 600#52525B
    White
    7.72
    Black
    2.71
  8. 700This color#3F3F46
    White
    10.44
    Black
    2.01
  9. 800#27272A
    White
    14.89
    Black
    1.40
  10. 900#18181B
    White
    17.71
    Black
    1.18
  11. 950#09090B
    White
    19.89
    Black
    1.05

Gamut

How vivid #3F3F46 can get

A gray has no hue, so no gamut holds a more vivid version of #3F3F46: more chroma would make it another color.

0.00.20.40.60.80.20.40.60.8 460480500520540560580600620
  • sRGB
  • Display P3
  • Rec. 2020
  • Dominant wavelength
OKLCH chroma
0.012
sRGB edge
No hue
Display P3 edge
No hue
Rec. 2020 edge
No hue
Dominant wavelength
464 nm
Excitation purity
8%
Chromaticity
x 0.2990, y 0.3064

Mixing

Mixing #3F3F46

Each row is the same mix worked out in a different space, with the halfway color at its end. sRGB, which older CSS gradients use, can sag gray or dark in the middle; OKLab keeps the lightness steps even; OKLCH holds chroma and hue as it goes.

White #FFFFFF

  • sRGB50%#9F9FA3
  • OKLab50%#99999D
  • OKLCH50%#99999D

Black #000000

  • sRGB50%#202023
  • OKLab50%#121215
  • OKLCH50%#121215
In CSS
/* A gradient and a mix, worked out in OKLCH */
background: linear-gradient(in oklch, #3f3f46, white);
color: color-mix(in oklch, #3f3f46 50%, white);

In use

#3F3F46 in an interface

A button, a link, a heading, a focused field, an icon and a chart line in this color, on a light page and a dark one. Each check is a WCAG 2 contrast minimum: 1.4.3 for text, 1.4.11 for the rest.

Light page

  • Button labelText, 4.5:110.44:1 Passes
  • Link and body-size textText, 4.5:110.44:1 Passes
  • Large headingLarge text, 3:110.44:1 Passes
  • Icons, borders and focus ringsNon-text, 3:110.44:1 Passes

Dark page

  • Button labelText, 4.5:110.44:1 Passes
  • Link and body-size textText, 4.5:11.79:1 Fails
  • Large headingLarge text, 3:11.79:1 Fails
  • Icons, borders and focus ringsNon-text, 3:11.79:1 Fails

For text on this page, the nearest shade that passes is #7C7C84 4.52:1

Color vision

How #3F3F46 looks with color blindness

As a neutral it barely changes under any simulation, ΔE2000 4.4 at most.

Simulated with Machado et al. (2009) at full severity, in linear light.

Simulate a whole page What each type sees

  • Protanopia

    No working red (long-wavelength) cones

    #3D4046 ΔE2000 2.1

    Close match

    Reads as dark gray

  • Deuteranopia

    No working green (medium-wavelength) cones

    #3D3F46 ΔE2000 1.2

    Very close

    Reads as dark gray

  • Tritanopia

    No working blue (short-wavelength) cones

    #3E4041 ΔE2000 4.3

    Close match

    Reads as dark gray

  • Achromatopsia

    No cone color vision; lightness only

    #404040 ΔE2000 4.4

    Close match

    Reads as dark gray

Pairing check

A near-neutral has no complementary hue to pair with, so tell it apart from neighboring grays by lightness contrast alone.

Harmony

Color harmonies for #3F3F46

A neutral has no hue to rotate, so every harmony collapses back to the same gray. Pair it with an accent color instead.

Or pair it by lightness: steps of its own scale as text on it, and what each can carry.

Build a lightness scale in Harmony Studio

  • Step 50 #F4F4FB · 9.53:1

    Body text, AAA

  • Step 300 #BDBDC5 · 5.59:1

    Body text, AA

  • Step 700 #57575E · 1.45:1

    Decoration only, under 3:1

Code

Design tokens

Ready-to-paste tokens in six formats. Rename them to fit your system.

CSS custom property

:root {
  --color-zinc-700: #3f3f46;
}

Tailwind config

// tailwind.config.js — already built in as zinc-700;
// pin the v3 value explicitly like this:
module.exports = {
  theme: {
    extend: {
      colors: {
        zinc: { 700: '#3f3f46' },
      },
    },
  },
};

Tailwind v4 theme

/* app.css — Tailwind CSS v4 */
@import "tailwindcss";

@theme {
  /* v4 has its own zinc-700; this pins the v3 value. */
  --color-zinc-700: oklch(0.370 0.012 285.8);
}

Design token (W3C DTCG)

{
  "color": {
    "zinc-700": {
      "$type": "color",
      "$value": {
        "colorSpace": "srgb",
        "components": [0.2471, 0.2471, 0.2745],
        "hex": "#3f3f46"
      },
      "$description": "Tailwind CSS v3 zinc-700"
    }
  }
}

SwiftUI color

import SwiftUI

enum Palette {
    static let zinc700 = Color(.sRGB, red: 0.247, green: 0.247, blue: 0.275, opacity: 1)
}

Jetpack Compose color

import androidx.compose.ui.graphics.Color

object Palette {
    val Zinc700 = Color(0xFF3F3F46)
}

Matches

The nearest match in each system

The closest CSS name, Tailwind shade, RAL Classic paint and Crayola crayon by ΔE2000; under 2 is hard to tell apart side by side. RAL and Crayola values approximate physical colors.

Neighbors

The eight nearest colors on this site by ΔE2000, closest first. Under 2 is hard to tell apart side by side.

Tools

Open #3F3F46 in the tools

Each opens over this page. More colors live in the Color Library, and every color page is listed on the hub.