Tailwind CSS v3 color · RAL Classic color

Tailwind neutral-950 #0A0A0A

Tailwind CSS v3's neutral-950 is #0A0A0A. It is also the usual sRGB approximation of RAL 9005 Jet black. It is a near-black in the neutral family. In OKLCH it sits at lightness 0.145 with chroma 0.000, too low for hue to matter. The nearest CSS named color is black (#000000), ΔE2000 1.6 away.

Relative luminance: 0.0030
OKLCH L · C · h: 0.145 · 0.000 · —
Best text: White 19.79:1
Hue family: Neutral

Inspect this color Check contrast

#0A0A0A color codes

HEX: #0A0A0A
RGB: rgb(10, 10, 10)
HSL: hsl(0, 0%, 4%)
OKLCH: oklch(0.145 0.000 0)
OKLab: oklab(0.145 0.000 0.000)
CIELAB (D65): L* 2.74, a* 0.00, b* 0.00
XYZ (D65): X 0.29, Y 0.30, Z 0.33
CMYK (naive): cmyk(0%, 0%, 0%, 96%)

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.

RAL and RAL Classic are trademarks of RAL gGmbH, which this site is not affiliated with. The sRGB value is an approximation of the printed swatch; check a physical RAL color card before you specify a paint.

Legibility

Contrast: is #0A0A0A accessible?

White text on it reaches 19.79:1, passing AAA. Black text fails at 1.06:1.

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

1.06:1
- AA fails
- AA large fails
- AAA fails
- APCA Lc 0
Text is here, unreadable at 1.06:1
White text on it

19.79:1
- AA passes
- AA large passes
- AAA passes
- APCA Lc −107
As text on black

1.06:1
- AA fails
- AA large fails
- AAA fails
- APCA Lc 0
Text is here, unreadable at 1.06:1
As text on white

19.79:1
- AA passes
- AA large passes
- AAA passes
- APCA Lc +105

Nearest versions that pass 4.5:1

For text on white

#0A0A0A 19.79:1

It already reaches 19.79:1 on white, so no change is needed.
For text on black

#767676 4.62:1

Lightening its OKLCH lightness from 0.14 to 0.56 reaches 4.62:1 on black, keeping the hue.

Compare both in the Contrast System

Checking another pair? Use the Contrast Checker.

Studio

Adjust #0A0A0A 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 #0A0A0A

Eleven OKLCH lightness steps at this hue, each with its contrast against white and black. #0A0A0A sits at step 950.

50#F5F5F5
White
1.09
Black
19.26
100#EBEBEB

White
1.19
Black
17.61
200#D7D7D7
White
1.43
Black
14.59
300#BEBEBE

White
1.85
Black
11.29
400#A1A1A1

White
2.58
Black
8.12
500#868686

White
3.64
Black
5.76
600#6F6F6F

White
5.02
Black
4.17
700#585858

White
7.11
Black
2.95
800#404040
White
10.36
Black
2.02
900#292929

White
14.54
Black
1.44
950This color#0A0A0A

White
19.79
Black
1.06

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

Tailwind CSS v3 neutral scale

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

50#FAFAFA
White
1.04
Black
20.11
100#F5F5F5
White
1.09
Black
19.26
200#E5E5E5
White
1.25
Black
16.67
300#D4D4D4
White
1.48
Black
14.16
400#A3A3A3
White
2.52
Black
8.32
500#737373
White
4.74
Black
4.42
600#525252
White
7.81
Black
2.68
700#404040
White
10.36
Black
2.02
800#262626
White
15.13
Black
1.38
900#171717
White
17.92
Black
1.17
950This color#0A0A0A

White
19.79
Black
1.06

Gamut

How vivid #0A0A0A can get

A gray has no hue, so no gamut holds a more vivid version of #0A0A0A: more chroma would make it another color.

sRGB
Display P3
Rec. 2020
Dominant wavelength

OKLCH chroma: 0.000
sRGB edge: No hue
Display P3 edge: No hue
Rec. 2020 edge: No hue
Dominant wavelength: None, near white
Excitation purity: 0%
Chromaticity: x 0.3127, y 0.3290

Mixing

Mixing #0A0A0A

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%#858585
OKLab50%#787878
OKLCH50%#787878

Black #000000

sRGB50%#050505
OKLab50%#010101
OKLCH50%#010101

In CSS

/* A gradient and a mix, worked out in OKLCH */
background: linear-gradient(in oklch, #0a0a0a, white);
color: color-mix(in oklch, #0a0a0a 50%, white);

In use

#0A0A0A 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, 4.5:119.79:1 Passes
Link and body-size textText, 4.5:119.79:1 Passes
Large headingLarge text, 3:119.79:1 Passes
Icons, borders and focus ringsNon-text, 3:119.79:1 Passes

Dark page

Button labelText, 4.5:119.79:1 Passes
Link and body-size textText, 4.5:11.05:1 Fails
Large headingLarge text, 3:11.05:1 Fails
Icons, borders and focus ringsNon-text, 3:11.05:1 Fails

Color vision

How #0A0A0A looks with color blindness

As a neutral it barely changes under any simulation, ΔE2000 0.0 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

#0A0A0A ΔE2000 0.0

Imperceptible

Reads as near-black
Deuteranopia

No working green (medium-wavelength) cones

#0A0A0A ΔE2000 0.0

Imperceptible

Reads as near-black
Tritanopia

No working blue (short-wavelength) cones

#0A0A0A ΔE2000 0.0

Imperceptible

Reads as near-black
Achromatopsia

No cone color vision; lightness only

#0A0A0A ΔE2000 0.0

Imperceptible

Reads as near-black

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 #0A0A0A

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 #F5F5F5 · 18.15:1

Body text, AAA
Step 300 #BEBEBE · 10.65:1

Body text, AAA
Step 700 #585858 · 2.78:1

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-neutral-950: #0a0a0a;
}

Tailwind config

// tailwind.config.js — already built in as neutral-950;
// pin the v3 value explicitly like this:
module.exports = {
  theme: {
    extend: {
      colors: {
        neutral: { 950: '#0a0a0a' },
      },
    },
  },
};

Tailwind v4 theme

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

@theme {
  /* v4 has its own neutral-950; this pins the v3 value. */
  --color-neutral-950: oklch(0.145 0.000 0);
}

Design token (W3C DTCG)

{
  "color": {
    "neutral-950": {
      "$type": "color",
      "$value": {
        "colorSpace": "srgb",
        "components": [0.0392, 0.0392, 0.0392],
        "hex": "#0a0a0a"
      },
      "$description": "Tailwind CSS v3 neutral-950"
    }
  }
}

SwiftUI color

import SwiftUI

enum Palette {
    static let neutral950 = Color(.sRGB, red: 0.039, green: 0.039, blue: 0.039, opacity: 1)
}

Jetpack Compose color

import androidx.compose.ui.graphics.Color

object Palette {
    val Neutral950 = Color(0xFF0A0A0A)
}

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.

Tools

Open #0A0A0A in the tools

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