RAL Classic color

RAL 3028 Pure red #CB3234

RAL 3028 Pure red is shown here as #CB3234, a widely published sRGB approximation of the printed swatch. It is a vivid red in the red family. In OKLCH it sits at lightness 0.557, chroma 0.190 and hue 25.3°. The nearest CSS named color is crimson (#DC143C), ΔE2000 4.7 away.

Relative luminance
0.1523
OKLCH L · C · h
0.557 · 0.190 · 25.3
Best text
White 5.19:1
Hue family
Red
Inspect this color Check contrast

#CB3234 color codes

HEX
#CB3234
RGB
rgb(203, 50, 52)
HSL
hsl(359, 60%, 50%)
OKLCH
oklch(0.557 0.190 25.3)
OKLab
oklab(0.557 0.171 0.081)
CIELAB (D65)
L* 45.95, a* 59.18, b* 36.16
XYZ (D65)
X 26.39, Y 15.23, Z 4.80
CMYK (naive)
cmyk(0%, 75%, 74%, 20%)

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 #CB3234 accessible?

White text on it reaches 5.19:1, passing AA. Black text manages only 4.04:1, enough for large text only.

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

    4.04:1

    • AA fails
    • AA large passes
    • AAA fails
    • APCA Lc +29

  • White text on it

    5.19:1

    • AA passes
    • AA large passes
    • AAA fails
    • APCA Lc −79

  • As text on black

    4.04:1

    • AA fails
    • AA large passes
    • AAA fails
    • APCA Lc −27

  • As text on white

    5.19:1

    • AA passes
    • AA large passes
    • AAA fails
    • APCA Lc +74

Nearest versions that pass 4.5:1

  • For text on white

    #CB3234 5.19:1

    It already reaches 5.19:1 on white, so no change is needed.

  • For text on black

    #D63D3D 4.59:1

    Lightening its OKLCH lightness from 0.56 to 0.59 reaches 4.59:1 on black, keeping the hue.

    Compare both in the Contrast System

Checking another pair? Use the Contrast Checker.

Studio

Adjust #CB3234 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 #CB3234

Eleven OKLCH lightness steps at this hue, each with its contrast against white and black. #CB3234 sits at step 600.

  1. 50#FFF2F0
    White
    1.09
    Black
    19.21
  2. 100#FFE4E1
    White
    1.20
    Black
    17.43
  3. 200#FFC8C2
    White
    1.46
    Black
    14.29
  4. 300#FFA098
    White
    1.95
    Black
    10.73
  5. 400#FF6B64
    White
    2.78
    Black
    7.53
  6. 500#E24947
    White
    3.97
    Black
    5.27
  7. 600This color#CB3234
    White
    5.19
    Black
    4.04
  8. 700#A70519
    White
    7.83
    Black
    2.67
  9. 800#7C000E
    White
    11.26
    Black
    1.86
  10. 900#540006
    White
    15.22
    Black
    1.37
  11. 950#320002
    White
    18.47
    Black
    1.13

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

Gamut

How vivid #CB3234 can get

At its lightness and hue, sRGB reaches OKLCH chroma 0.226; #CB3234 uses 84% of it. Display P3, which many recent phones and laptops show, reaches 0.255 there: 13% more.

0.00.20.40.60.80.20.40.60.8 460480500520540560580600620
  • sRGB
  • Display P3
  • Rec. 2020
  • Dominant wavelength
OKLCH chroma
0.190
sRGB edge
0.226
Display P3 edge
0.255
Rec. 2020 edge
0.285
Dominant wavelength
612 nm
Excitation purity
71%
Chromaticity
x 0.5686, y 0.3281
  • This color#CB3234
  • Most vivid in sRGB#D90021
  • Most vivid in Display P3oklch(0.557 0.255 25.3)

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

Use the wider color where screens show it
.accent {
  color: #cb3234;
}
@media (color-gamut: p3) {
  .accent { color: color(display-p3 0.8142 0 0.1195); }
}

Mixing

Mixing #CB3234

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%#E5999A
  • OKLab50%#EE9F98
  • OKLCH50%#EE9F98

Black #000000

  • sRGB50%#66191A
  • OKLab50%#4D0D0E
  • OKLCH50%#4D0D0E

Its complement #00838E

  • sRGB50%#665B61
  • OKLab50%#8D6965
  • OKLCH50%#727B00
In CSS
/* A gradient and a mix, worked out in OKLCH */
background: linear-gradient(in oklch, #cb3234, white);
color: color-mix(in oklch, #cb3234 50%, white);

In use

#CB3234 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, 4.5:15.19:1 Passes
  • Link and body-size textText, 4.5:15.19:1 Passes
  • Large headingLarge text, 3:15.19:1 Passes
  • Icons, borders and focus ringsNon-text, 3:15.19:1 Passes

Dark page

  • Button labelText, 4.5:15.19:1 Passes
  • Link and body-size textText, 4.5:13.60:1 Fails
  • Large headingLarge text, 3:13.60:1 Passes
  • Icons, borders and focus ringsNon-text, 3:13.60:1 Passes

For text on this page, the nearest shade that passes is #DF4644 4.54:1

Color vision

How #CB3234 looks with color blindness

Deuteranopia changes it most, ΔE2000 39.5; tritanopia changes it least, 4.2.

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

    #605832 ΔE2000 35.0

    Distinct

    Reads as dark muted brown

  • Deuteranopia

    No working green (medium-wavelength) cones

    #86792E ΔE2000 39.5

    Distinct

    Reads as muted amber

  • Tritanopia

    No working blue (short-wavelength) cones

    #DF0035 ΔE2000 4.2

    Close match

    Reads as vivid red

  • Achromatopsia

    No cone color vision; lightness only

    #6D6D6D ΔE2000 27.3

    Distinct

    Reads as gray

Pairing check

Checked against its complement, #00838E. Their lightness contrast is only 1.14:1, so where hue collapses, add a label, icon or pattern.

VisionThe pairΔE2000Verdict
Normal vision#CB3234 · #00838E51.6Stays distinct
Protanopia#605832 · #777D8F29.4Stays distinct
Deuteranopia#86792E · #66718E37.2Stays distinct
Tritanopia#DF0035 · #00898659.7Stays distinct
Achromatopsia#6D6D6D · #7676763.6Easily confused

Harmony

Color harmonies for #CB3234

Its complement is #00838E, a muted cyan, 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#CB3234
  • Complement#00838E

Complementary

Open in Harmony Studio
  • −30°#C23278
  • Base#CB3234
  • +30°#AF5900

Analogous

Open in Harmony Studio
  • Base#CB3234
  • +120°#008C26
  • +240°#3C69E1

Triadic

Open in Harmony Studio
  • Base#CB3234
  • +150°#008770
  • +210°#007DAF

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-3028: #cb3234;
}

Tailwind config

// tailwind.config.js
module.exports = {
  theme: {
    extend: {
      colors: {
        'ral-3028': '#cb3234',
      },
    },
  },
};

Tailwind v4 theme

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

@theme {
  --color-ral-3028: oklch(0.557 0.190 25.3);
}

Design token (W3C DTCG)

{
  "color": {
    "ral-3028": {
      "$type": "color",
      "$value": {
        "colorSpace": "srgb",
        "components": [0.7961, 0.1961, 0.2039],
        "hex": "#cb3234"
      },
      "$description": "RAL 3028 Pure red (approximate sRGB)"
    }
  }
}

SwiftUI color

import SwiftUI

enum Palette {
    static let ral3028 = Color(.sRGB, red: 0.796, green: 0.196, blue: 0.204, opacity: 1)
}

Jetpack Compose color

import androidx.compose.ui.graphics.Color

object Palette {
    val Ral3028 = Color(0xFFCB3234)
}

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 #CB3234 in the tools

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