Tailwind CSS v3 color

Tailwind gray-700 #374151

Tailwind CSS v3's gray-700 is #374151. It is a dark grayish blue in the neutral family. In OKLCH it sits at lightness 0.373, chroma 0.031 and hue 259.7°. The nearest CSS named color is darkslateblue (#483D8B), ΔE2000 12.7 away.

Relative luminance
0.0519
OKLCH L · C · h
0.373 · 0.031 · 259.7
Best text
White 10.30:1
Hue family
Neutral
Inspect this color Check contrast

#374151 color codes

HEX
#374151
RGB
rgb(55, 65, 81)
HSL
hsl(217, 19%, 27%)
OKLCH
oklch(0.373 0.031 259.7)
OKLab
oklab(0.373 -0.005 -0.030)
CIELAB (D65)
L* 27.26, a* 0.26, b* -10.97
XYZ (D65)
X 4.95, Y 5.19, Z 8.52
CMYK (naive)
cmyk(32%, 20%, 0%, 68%)

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 #374151 accessible?

White text on it reaches 10.30:1, passing AAA. Black text fails at 2.03:1.

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

    2.03:1

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

  • White text on it

    10.30:1

    • AA passes
    • AA large passes
    • AAA passes
    • APCA Lc −97

  • As text on black

    2.03:1

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

  • As text on white

    10.30:1

    • AA passes
    • AA large passes
    • AAA passes
    • APCA Lc +93

Nearest versions that pass 4.5:1

  • For text on white

    #374151 10.30:1

    It already reaches 10.30:1 on white, so no change is needed.

  • For text on black

    #6B7688 4.57:1

    Lightening its OKLCH lightness from 0.37 to 0.56 reaches 4.57:1 on black, keeping the hue.

    Compare both in the Contrast System

Checking another pair? Use the Contrast Checker.

Studio

Adjust #374151 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 #374151

Eleven OKLCH lightness steps at this hue, each with its contrast against white and black. #374151 sits at step 800.

  1. 50#F0F6FF
    White
    1.08
    Black
    19.33
  2. 100#E1ECFD
    White
    1.19
    Black
    17.61
  3. 200#CDD8EA
    White
    1.43
    Black
    14.60
  4. 300#B3BFD1
    White
    1.86
    Black
    11.28
  5. 400#97A2B5
    White
    2.57
    Black
    8.15
  6. 500#7B8799
    White
    3.64
    Black
    5.76
  7. 600#646F81
    White
    5.08
    Black
    4.13
  8. 700#4E5969
    White
    7.10
    Black
    2.95
  9. 800This color#374151
    White
    10.30
    Black
    2.03
  10. 900#212936
    White
    14.63
    Black
    1.43
  11. 950#101621
    White
    18.12
    Black
    1.15

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

Tailwind CSS v3 gray scale

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

  1. 50#F9FAFB
    White
    1.04
    Black
    20.09
  2. 100#F3F4F6
    White
    1.10
    Black
    19.08
  3. 200#E5E7EB
    White
    1.23
    Black
    16.96
  4. 300#D1D5DB
    White
    1.47
    Black
    14.25
  5. 400#9CA3AF
    White
    2.53
    Black
    8.27
  6. 500#6B7280
    White
    4.83
    Black
    4.34
  7. 600#4B5563
    White
    7.55
    Black
    2.77
  8. 700This color#374151
    White
    10.30
    Black
    2.03
  9. 800#1F2937
    White
    14.67
    Black
    1.43
  10. 900#111827
    White
    17.73
    Black
    1.18
  11. 950#030712
    White
    20.13
    Black
    1.04

Gamut

How vivid #374151 can get

At its lightness and hue, sRGB reaches OKLCH chroma 0.150; #374151 uses 20% of it. Display P3, which many recent phones and laptops show, reaches 0.190 there: 26% more.

0.00.20.40.60.80.20.40.60.8 460480500520540560580600620
  • sRGB
  • Display P3
  • Rec. 2020
  • Dominant wavelength
OKLCH chroma
0.031
sRGB edge
0.150
Display P3 edge
0.190
Rec. 2020 edge
0.285
Dominant wavelength
477 nm
Excitation purity
23%
Chromaticity
x 0.2653, y 0.2779
  • This color#374151
  • Most vivid in sRGB#00398E
  • Most vivid in Display P3oklch(0.373 0.190 259.7)

On a screen without Display P3 the last tile shows the sRGB edge instead.

Use the wider color where screens show it
.accent {
  color: #374151;
}
@media (color-gamut: p3) {
  .accent { color: color(display-p3 0 0.1905 0.6093); }
}

Mixing

Mixing #374151

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%#9BA0A8
  • OKLab50%#959BA4
  • OKLCH50%#959BA4

Black #000000

  • sRGB50%#1C2129
  • OKLab50%#0F131A
  • OKLCH50%#0F131A

Its complement #493F2E

  • sRGB50%#404040
  • OKLab50%#404040
  • OKLCH50%#30463E
In CSS
/* A gradient and a mix, worked out in OKLCH */
background: linear-gradient(in oklch, #374151, white);
color: color-mix(in oklch, #374151 50%, white);

In use

#374151 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, 4.5:110.30:1 Passes
  • Link and body-size textText, 4.5:110.30:1 Passes
  • Large headingLarge text, 3:110.30:1 Passes
  • Icons, borders and focus ringsNon-text, 3:110.30:1 Passes

Dark page

  • Button labelText, 4.5:110.30:1 Passes
  • Link and body-size textText, 4.5:11.81:1 Fails
  • Large headingLarge text, 3:11.81:1 Fails
  • Icons, borders and focus ringsNon-text, 3:11.81:1 Fails

For text on this page, the nearest shade that passes is #727D8F 4.50:1

Color vision

How #374151 looks with color blindness

Tritanopia changes it most, ΔE2000 10.5; protanopia changes it least, 2.1.

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

    #3C4252 ΔE2000 2.1

    Close match

    Reads as dark grayish blue

  • Deuteranopia

    No working green (medium-wavelength) cones

    #393F51 ΔE2000 2.7

    Close match

    Reads as dark grayish blue

  • Tritanopia

    No working blue (short-wavelength) cones

    #304446 ΔE2000 10.5

    Distinct

    Reads as dark grayish teal

  • Achromatopsia

    No cone color vision; lightness only

    #404040 ΔE2000 8.8

    Noticeable

    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 #374151

Its complement is #493F2E, a dark grayish brown.

Hue rotations in OKLCH, mapped into sRGB by trimming chroma so hue and lightness stay put.

Open the Harmony Studio
  • Base#374151
  • Complement#493F2E

Complementary

Open in Harmony Studio
  • −30°#30444E
  • Base#374151
  • +30°#403E50

Analogous

Open in Harmony Studio
  • Base#374151
  • +120°#503A3A
  • +240°#384535

Triadic

Open in Harmony Studio
  • Base#374151
  • +150°#4E3C32
  • +210°#41422F

Split-complementary

Open in Harmony Studio

Code

Design tokens

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

CSS custom property

:root {
  --color-gray-700: #374151;
}

Tailwind config

// tailwind.config.js — already built in as gray-700;
// pin the v3 value explicitly like this:
module.exports = {
  theme: {
    extend: {
      colors: {
        gray: { 700: '#374151' },
      },
    },
  },
};

Tailwind v4 theme

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

@theme {
  /* v4 has its own gray-700; this pins the v3 value. */
  --color-gray-700: oklch(0.373 0.031 259.7);
}

Design token (W3C DTCG)

{
  "color": {
    "gray-700": {
      "$type": "color",
      "$value": {
        "colorSpace": "srgb",
        "components": [0.2157, 0.2549, 0.3176],
        "hex": "#374151"
      },
      "$description": "Tailwind CSS v3 gray-700"
    }
  }
}

SwiftUI color

import SwiftUI

enum Palette {
    static let gray700 = Color(.sRGB, red: 0.216, green: 0.255, blue: 0.318, opacity: 1)
}

Jetpack Compose color

import androidx.compose.ui.graphics.Color

object Palette {
    val Gray700 = Color(0xFF374151)
}

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 #374151 in the tools

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