RAL Classic color

RAL 2001 Red orange #C93C20

RAL 2001 Red orange is shown here as #C93C20, a widely published sRGB approximation of the printed swatch. It is a vivid red in the red family. In OKLCH it sits at lightness 0.561, chroma 0.182 and hue 33.1°. The nearest CSS named color is firebrick (#B22222), ΔE2000 8.5 away.

Relative luminance: 0.1575
OKLCH L · C · h: 0.561 · 0.182 · 33.1
Best text: White 5.05:1
Hue family: Red

Inspect this color Check contrast

#C93C20 color codes

HEX: #C93C20
RGB: rgb(201, 60, 32)
HSL: hsl(10, 73%, 46%)
OKLCH: oklch(0.561 0.182 33.1)
OKLab: oklab(0.561 0.153 0.100)
CIELAB (D65): L* 46.65, a* 54.37, b* 47.35
XYZ (D65): X 25.97, Y 15.76, Z 3.04
CMYK (naive): cmyk(0%, 70%, 84%, 21%)

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 #C93C20 accessible?

White text on it reaches 5.05:1, passing AA. Black text manages only 4.15:1, 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

4.15:1
- AA fails
- AA large passes
- AAA fails
- APCA Lc +30
White text on it

5.05:1
- AA passes
- AA large passes
- AAA fails
- APCA Lc −79
As text on black

4.15:1
- AA fails
- AA large passes
- AAA fails
- APCA Lc −27
As text on white

5.05:1
- AA passes
- AA large passes
- AAA fails
- APCA Lc +73

Nearest versions that pass 4.5:1

For text on white

#C93C20 5.05:1

It already reaches 5.05:1 on white, so no change is needed.
For text on black

#D04327 4.51:1

Lightening its OKLCH lightness from 0.56 to 0.58 reaches 4.51:1 on black, keeping the hue.

Compare both in the Contrast System

Checking another pair? Use the Contrast Checker.

Studio

Adjust #C93C20 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 #C93C20

Eleven OKLCH lightness steps at this hue, each with its contrast against white and black. #C93C20 sits at step 600.

50#FFF2EF

White
1.09
Black
19.19
100#FFE4DE

White
1.20
Black
17.40
200#FFC9BD

White
1.46
Black
14.34
300#FFA28D

White
1.94
Black
10.80
400#FD6F53

White
2.77
Black
7.57
500#DE5034

White
3.96
Black
5.30
600This color#C93C20

White
5.05
Black
4.15
700#A11E00

White
7.77
Black
2.70
800#771400

White
11.14
Black
1.88
900#500900

White
15.21
Black
1.38
950#300300

White
18.44
Black
1.13

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

Gamut

How vivid #C93C20 can get

At its lightness and hue, sRGB reaches OKLCH chroma 0.207; #C93C20 uses 88% of it. Display P3, which many recent phones and laptops show, reaches 0.232 there: 12% more.

sRGB
Display P3
Rec. 2020
Dominant wavelength

OKLCH chroma: 0.182
sRGB edge: 0.207
Display P3 edge: 0.232
Rec. 2020 edge: 0.231
Dominant wavelength: 604 nm
Excitation purity: 81%
Chromaticity: x 0.5801, y 0.3520

This color#C93C20
Most vivid in sRGB#D22B00
Most vivid in Display P3oklch(0.561 0.232 33.1)

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

Use the wider color where screens show it

.accent {
  color: #c93c20;
}
@media (color-gamut: p3) {
  .accent { color: color(display-p3 0.7904 0.1721 0); }
}

Mixing

Mixing #C93C20

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%#E49E90
OKLab50%#ECA292
OKLCH50%#ECA292

Black #000000

sRGB50%#651E10
OKLab50%#4C1106
OKLCH50%#4C1106

Its complement #008397

sRGB50%#65605C
OKLab50%#8C6C65
OKLCH50%#865DB7

In CSS

/* A gradient and a mix, worked out in OKLCH */
background: linear-gradient(in oklch, #c93c20, white);
color: color-mix(in oklch, #c93c20 50%, white);

In use

#C93C20 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, 4.5:15.05:1 Passes
Link and body-size textText, 4.5:15.05:1 Passes
Large headingLarge text, 3:15.05:1 Passes
Icons, borders and focus ringsNon-text, 3:15.05:1 Passes

Dark page

Button labelText, 4.5:15.05:1 Passes
Link and body-size textText, 4.5:13.70:1 Fails
Large headingLarge text, 3:13.70:1 Passes
Icons, borders and focus ringsNon-text, 3:13.70:1 Passes

For text on this page, the nearest shade that passes is #DB4D31 4.56:1

Color vision

How #C93C20 looks with color blindness

Deuteranopia changes it most, ΔE2000 36.6; tritanopia changes it least, 10.6.

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

#665B1B ΔE2000 34.4

Distinct

Reads as dark muted brown
Deuteranopia

No working green (medium-wavelength) cones

#897A18 ΔE2000 36.6

Distinct

Reads as soft amber
Tritanopia

No working blue (short-wavelength) cones

#DE0037 ΔE2000 10.6

Distinct

Reads as vivid red
Achromatopsia

No cone color vision; lightness only

#6F6F6F ΔE2000 27.6

Distinct

Reads as gray

Pairing check

Checked against its complement, #008397. Their lightness contrast is only 1.13:1, so where hue collapses, add a label, icon or pattern.

Vision	The pair	ΔE2000	Verdict
Normal vision	#C93C20 · #008397	48.6	Stays distinct
Protanopia	#665B1B · #747E98	36.7	Stays distinct
Deuteranopia	#897A18 · #637297	42.3	Stays distinct
Tritanopia	#DE0037 · #008B89	59.8	Stays distinct
Achromatopsia	#6F6F6F · #777777	3.2	Easily confused

Harmony

Color harmonies for #C93C20

Its complement is #008397, 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#C93C20
Complement#008397

Complementary

Open in Harmony Studio

−30°#C5366A
Base#C93C20
+30°#A86100

Analogous

Open in Harmony Studio

Base#C93C20
+120°#008C49
+240°#5565DD

Triadic

Open in Harmony Studio

Base#C93C20
+150°#00877A
+210°#007BBD

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-2001: #c93c20;
}

Tailwind config

// tailwind.config.js
module.exports = {
  theme: {
    extend: {
      colors: {
        'ral-2001': '#c93c20',
      },
    },
  },
};

Tailwind v4 theme

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

@theme {
  --color-ral-2001: oklch(0.561 0.182 33.1);
}

Design token (W3C DTCG)

{
  "color": {
    "ral-2001": {
      "$type": "color",
      "$value": {
        "colorSpace": "srgb",
        "components": [0.7882, 0.2353, 0.1255],
        "hex": "#c93c20"
      },
      "$description": "RAL 2001 Red orange (approximate sRGB)"
    }
  }
}

SwiftUI color

import SwiftUI

enum Palette {
    static let ral2001 = Color(.sRGB, red: 0.788, green: 0.235, blue: 0.125, opacity: 1)
}

Jetpack Compose color

import androidx.compose.ui.graphics.Color

object Palette {
    val Ral2001 = Color(0xFFC93C20)
}

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 #C93C20 in the tools

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

RAL 2001 Red orange #C93C20

#C93C20 color codes

Contrast: is #C93C20 accessible?

Black text on it

White text on it

As text on black

As text on white

Nearest versions that pass 4.5:1

Adjust #C93C20 live

Shades and tints of #C93C20

How vivid #C93C20 can get

Mixing #C93C20

#C93C20 in an interface

How #C93C20 looks with color blindness

Protanopia

Deuteranopia

Tritanopia

Achromatopsia

Pairing check

Color harmonies for #C93C20

Complementary

Analogous

Triadic

Split-complementary

Design tokens

CSS custom property

Tailwind config

Tailwind v4 theme

Design token (W3C DTCG)

SwiftUI color

Jetpack Compose color

The nearest match in each system

Similar colors

Open #C93C20 in the tools