Tailwind CSS v3 color

Tailwind stone-400 #A8A29E

Tailwind CSS v3's stone-400 is #A8A29E. It is a gray in the neutral family. In OKLCH it sits at lightness 0.716 with chroma 0.009, too low for hue to matter. The nearest CSS named color is darkgray (#A9A9A9), ΔE2000 3.7 away.

Relative luminance
0.3663
OKLCH L · C · h
0.716 · 0.009 · 56.3
Best text
Black 8.32:1
Hue family
Neutral
Inspect this color Check contrast

#A8A29E color codes

HEX
#A8A29E
RGB
rgb(168, 162, 158)
HSL
hsl(24, 5%, 64%)
OKLCH
oklch(0.716 0.009 56.3)
OKLab
oklab(0.716 0.005 0.008)
CIELAB (D65)
L* 67.00, a* 1.43, b* 2.85
XYZ (D65)
X 35.24, Y 36.63, Z 37.56
CMYK (naive)
cmyk(0%, 4%, 6%, 34%)

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 #A8A29E accessible?

Black text on it reaches 8.32:1, passing AAA. White text fails at 2.52:1.

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

    8.32:1

    • AA passes
    • AA large passes
    • AAA passes
    • APCA Lc +54

  • White text on it

    2.52:1

    • AA fails
    • AA large fails
    • AAA fails
    • APCA Lc −54

  • As text on black

    8.32:1

    • AA passes
    • AA large passes
    • AAA passes
    • APCA Lc −52

  • As text on white

    2.52:1

    • AA fails
    • AA large fails
    • AAA fails
    • APCA Lc +49

Nearest versions that pass 4.5:1

  • For text on white

    #7B7571 4.54:1

    Darkening its OKLCH lightness from 0.72 to 0.57 reaches 4.54:1 on white, keeping the hue.

    Compare both in the Contrast System

  • For text on black

    #A8A29E 8.32:1

    It already reaches 8.32:1 on black, so no change is needed.

Checking another pair? Use the Contrast Checker.

Studio

Adjust #A8A29E 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 #A8A29E

Eleven OKLCH lightness steps at this hue, each with its contrast against white and black. #A8A29E sits at step 400.

  1. 50#F9F4F1
    White
    1.09
    Black
    19.23
  2. 100#EFEAE6
    White
    1.19
    Black
    17.58
  3. 200#DCD6D2
    White
    1.43
    Black
    14.59
  4. 300#C2BCB9
    White
    1.87
    Black
    11.18
  5. 400This color#A8A29E
    White
    2.52
    Black
    8.32
  6. 500#8B8581
    White
    3.63
    Black
    5.76
  7. 600#736D6A
    White
    5.09
    Black
    4.12
  8. 700#5C5753
    White
    7.13
    Black
    2.94
  9. 800#433F3C
    White
    10.42
    Black
    2.01
  10. 900#2C2825
    White
    14.61
    Black
    1.43
  11. 950#191513
    White
    18.13
    Black
    1.15

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

Tailwind CSS v3 stone scale

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

  1. 50#FAFAF9
    White
    1.04
    Black
    20.10
  2. 100#F5F5F4
    White
    1.09
    Black
    19.24
  3. 200#E7E5E4
    White
    1.25
    Black
    16.72
  4. 300#D6D3D1
    White
    1.48
    Black
    14.09
  5. 400This color#A8A29E
    White
    2.52
    Black
    8.32
  6. 500#78716C
    White
    4.79
    Black
    4.37
  7. 600#57534E
    White
    7.62
    Black
    2.75
  8. 700#44403C
    White
    10.27
    Black
    2.04
  9. 800#292524
    White
    15.16
    Black
    1.38
  10. 900#1C1917
    White
    17.48
    Black
    1.20
  11. 950#0C0A09
    White
    19.75
    Black
    1.06

Gamut

How vivid #A8A29E can get

A gray has no hue, so no gamut holds a more vivid version of #A8A29E: 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
0.009
sRGB edge
No hue
Display P3 edge
No hue
Rec. 2020 edge
No hue
Dominant wavelength
583 nm
Excitation purity
4%
Chromaticity
x 0.3220, y 0.3348

Mixing

Mixing #A8A29E

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%#D4D1CF
  • OKLab50%#D3D0CD
  • OKLCH50%#D3D0CD

Black #000000

  • sRGB50%#54514F
  • OKLab50%#3F3C3A
  • OKLCH50%#3F3C3A
In CSS
/* A gradient and a mix, worked out in OKLCH */
background: linear-gradient(in oklch, #a8a29e, white);
color: color-mix(in oklch, #a8a29e 50%, white);

In use

#A8A29E 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, 4.5:18.32:1 Passes
  • Link and body-size textText, 4.5:12.52:1 Fails
  • Large headingLarge text, 3:12.52:1 Fails
  • Icons, borders and focus ringsNon-text, 3:12.52:1 Fails

For text on this page, the nearest shade that passes is #7B7571 4.54:1

Dark page

  • Button labelText, 4.5:18.32:1 Passes
  • Link and body-size textText, 4.5:17.42:1 Passes
  • Large headingLarge text, 3:17.42:1 Passes
  • Icons, borders and focus ringsNon-text, 3:17.42:1 Passes

Color vision

How #A8A29E looks with color blindness

As a neutral it barely changes under any simulation, ΔE2000 3.3 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

    #A4A29E ΔE2000 2.1

    Close match

    Reads as gray

  • Deuteranopia

    No working green (medium-wavelength) cones

    #A5A49E ΔE2000 3.2

    Close match

    Reads as gray

  • Tritanopia

    No working blue (short-wavelength) cones

    #AAA1A1 ΔE2000 3.0

    Close match

    Reads as gray

  • Achromatopsia

    No cone color vision; lightness only

    #A3A3A3 ΔE2000 3.3

    Close match

    Reads as 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 #A8A29E

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 950 #191513 · 7.19:1

    Body text, AAA

  • Step 700 #5C5753 · 2.82:1

    Decoration only, under 3:1

  • Step 300 #C2BCB9 · 1.34:1

    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-stone-400: #a8a29e;
}

Tailwind config

// tailwind.config.js — already built in as stone-400;
// pin the v3 value explicitly like this:
module.exports = {
  theme: {
    extend: {
      colors: {
        stone: { 400: '#a8a29e' },
      },
    },
  },
};

Tailwind v4 theme

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

@theme {
  /* v4 has its own stone-400; this pins the v3 value. */
  --color-stone-400: oklch(0.716 0.009 56.3);
}

Design token (W3C DTCG)

{
  "color": {
    "stone-400": {
      "$type": "color",
      "$value": {
        "colorSpace": "srgb",
        "components": [0.6588, 0.6353, 0.6196],
        "hex": "#a8a29e"
      },
      "$description": "Tailwind CSS v3 stone-400"
    }
  }
}

SwiftUI color

import SwiftUI

enum Palette {
    static let stone400 = Color(.sRGB, red: 0.659, green: 0.635, blue: 0.620, opacity: 1)
}

Jetpack Compose color

import androidx.compose.ui.graphics.Color

object Palette {
    val Stone400 = Color(0xFFA8A29E)
}

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 #A8A29E in the tools

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