RAL Classic color

RAL 3009 Oxide red #642424

RAL 3009 Oxide red is shown here as #642424, a widely published sRGB approximation of the printed swatch. It is a dark muted brown in the brown family. In OKLCH it sits at lightness 0.356, chroma 0.093 and hue 23.0°. The nearest CSS named color is maroon (#800000), ΔE2000 10.8 away.

Relative luminance
0.0410
OKLCH L · C · h
0.356 · 0.093 · 23.0
Best text
White 11.54:1
Hue family
Brown
Inspect this color Check contrast

#642424 color codes

HEX
#642424
RGB
rgb(100, 36, 36)
HSL
hsl(0, 47%, 27%)
OKLCH
oklch(0.356 0.093 23.0)
OKLab
oklab(0.356 0.086 0.036)
CIELAB (D65)
L* 24.00, a* 28.93, b* 15.04
XYZ (D65)
X 6.21, Y 4.10, Z 2.13
CMYK (naive)
cmyk(0%, 64%, 64%, 61%)

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 #642424 accessible?

White text on it reaches 11.54:1, passing AAA. Black text fails at 1.81:1.

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

    1.81:1

    • AA fails
    • AA large fails
    • AAA fails
    • APCA Lc +7

  • White text on it

    11.54:1

    • AA passes
    • AA large passes
    • AAA passes
    • APCA Lc −99

  • As text on black

    1.81:1

    • AA fails
    • AA large fails
    • AAA fails
    • APCA Lc 0

  • As text on white

    11.54:1

    • AA passes
    • AA large passes
    • AAA passes
    • APCA Lc +95

Nearest versions that pass 4.5:1

  • For text on white

    #642424 11.54:1

    It already reaches 11.54:1 on white, so no change is needed.

  • For text on black

    #A8615E 4.53:1

    Lightening its OKLCH lightness from 0.36 to 0.57 reaches 4.53:1 on black, keeping the hue.

    Compare both in the Contrast System

Checking another pair? Use the Contrast Checker.

Studio

Adjust #642424 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 #642424

Eleven OKLCH lightness steps at this hue, each with its contrast against white and black. #642424 sits at step 800.

  1. 50#FFF2F0
    White
    1.09
    Black
    19.21
  2. 100#FFE4E2
    White
    1.20
    Black
    17.44
  3. 200#FFC8C4
    White
    1.46
    Black
    14.31
  4. 300#F1A8A3
    White
    1.93
    Black
    10.87
  5. 400#D58B87
    White
    2.66
    Black
    7.87
  6. 500#B86F6C
    White
    3.79
    Black
    5.52
  7. 600#9D5855
    White
    5.30
    Black
    3.96
  8. 700#834240
    White
    7.45
    Black
    2.81
  9. 800This color#642424
    White
    11.54
    Black
    1.81
  10. 900#481516
    White
    15.06
    Black
    1.39
  11. 950#2F0406
    White
    18.40
    Black
    1.14

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

Gamut

How vivid #642424 can get

At its lightness and hue, sRGB reaches OKLCH chroma 0.144; #642424 uses 65% of it. Display P3, which many recent phones and laptops show, reaches 0.162 there: 13% more.

0.00.20.40.60.80.20.40.60.8 460480500520540560580600620
  • sRGB
  • Display P3
  • Rec. 2020
  • Dominant wavelength
OKLCH chroma
0.093
sRGB edge
0.144
Display P3 edge
0.162
Rec. 2020 edge
0.189
Dominant wavelength
611 nm
Excitation purity
52%
Chromaticity
x 0.4989, y 0.3296
  • This color#642424
  • Most vivid in sRGB#760013
  • Most vivid in Display P3oklch(0.356 0.162 23.0)

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

Use the wider color where screens show it
.accent {
  color: #642424;
}
@media (color-gamut: p3) {
  .accent { color: color(display-p3 0.4408 0 0.0682); }
}

Mixing

Mixing #642424

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%#B29292
  • OKLab50%#B38D8A
  • OKLCH50%#B38D8A

Black #000000

  • sRGB50%#321212
  • OKLab50%#220707
  • OKLCH50%#220707

Its complement #00454A

  • sRGB50%#323537
  • OKLab50%#443938
  • OKLCH50%#3D4004
In CSS
/* A gradient and a mix, worked out in OKLCH */
background: linear-gradient(in oklch, #642424, white);
color: color-mix(in oklch, #642424 50%, white);

In use

#642424 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, 4.5:111.54:1 Passes
  • Link and body-size textText, 4.5:111.54:1 Passes
  • Large headingLarge text, 3:111.54:1 Passes
  • Icons, borders and focus ringsNon-text, 3:111.54:1 Passes

Dark page

  • Button labelText, 4.5:111.54:1 Passes
  • Link and body-size textText, 4.5:11.62:1 Fails
  • Large headingLarge text, 3:11.62:1 Fails
  • Icons, borders and focus ringsNon-text, 3:11.62:1 Fails

For text on this page, the nearest shade that passes is #B16966 4.53:1

Color vision

How #642424 looks with color blindness

Deuteranopia changes it most, ΔE2000 25.8; tritanopia changes it least, 4.1.

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

    #343123 ΔE2000 24.7

    Distinct

    Reads as dark grayish brown

  • Deuteranopia

    No working green (medium-wavelength) cones

    #443E22 ΔE2000 25.8

    Distinct

    Reads as dark grayish brown

  • Tritanopia

    No working blue (short-wavelength) cones

    #6E1825 ΔE2000 4.1

    Close match

    Reads as dark soft brown

  • Achromatopsia

    No cone color vision; lightness only

    #393939 ΔE2000 21.8

    Distinct

    Reads as dark gray

Pairing check

Checked against its complement, #00454A. Their lightness contrast is only 1.07:1, so where hue collapses, add a label, icon or pattern.

VisionThe pairΔE2000Verdict
Normal vision#642424 · #00454A39.3Stays distinct
Protanopia#343123 · #3E414A14.8Stays distinct
Deuteranopia#443E22 · #353B4A22.6Stays distinct
Tritanopia#6E1825 · #00484644.3Stays distinct
Achromatopsia#393939 · #3E3E3E1.6Easily confused

Harmony

Color harmonies for #642424

Its complement is #00454A, a dark muted teal, on the cool side of the wheel.

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

Open the Harmony Studio
  • Base#642424
  • Complement#00454A

Complementary

Open in Harmony Studio
  • −30°#5F2440
  • Base#642424
  • +30°#5F2C00

Analogous

Open in Harmony Studio
  • Base#642424
  • +120°#184817
  • +240°#213A6C

Triadic

Open in Harmony Studio
  • Base#642424
  • +150°#004739
  • +210°#00425C

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-ral-3009: #642424;
}

Tailwind config

// tailwind.config.js
module.exports = {
  theme: {
    extend: {
      colors: {
        'ral-3009': '#642424',
      },
    },
  },
};

Tailwind v4 theme

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

@theme {
  --color-ral-3009: oklch(0.356 0.093 23.0);
}

Design token (W3C DTCG)

{
  "color": {
    "ral-3009": {
      "$type": "color",
      "$value": {
        "colorSpace": "srgb",
        "components": [0.3922, 0.1412, 0.1412],
        "hex": "#642424"
      },
      "$description": "RAL 3009 Oxide red (approximate sRGB)"
    }
  }
}

SwiftUI color

import SwiftUI

enum Palette {
    static let ral3009 = Color(.sRGB, red: 0.392, green: 0.141, blue: 0.141, opacity: 1)
}

Jetpack Compose color

import androidx.compose.ui.graphics.Color

object Palette {
    val Ral3009 = Color(0xFF642424)
}

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 #642424 in the tools

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