RAL Classic color

RAL 5013 Cobalt blue #1E213D

RAL 5013 Cobalt blue is shown here as #1E213D, a widely published sRGB approximation of the printed swatch. It is a very dark muted blue in the blue family. In OKLCH it sits at lightness 0.260, chroma 0.052 and hue 277.5°. The nearest CSS named color is midnightblue (#191970), ΔE2000 12.8 away.

Relative luminance: 0.0170
OKLCH L · C · h: 0.260 · 0.052 · 277.5
Best text: White 15.67:1
Hue family: Blue

Inspect this color Check contrast

#1E213D color codes

HEX: #1E213D
RGB: rgb(30, 33, 61)
HSL: hsl(234, 34%, 18%)
OKLCH: oklch(0.260 0.052 277.5)
OKLab: oklab(0.260 0.007 -0.052)
CIELAB (D65): L* 13.83, a* 7.63, b* -18.43
XYZ (D65): X 1.92, Y 1.70, Z 4.64
CMYK (naive): cmyk(51%, 46%, 0%, 76%)

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 #1E213D accessible?

White text on it reaches 15.67:1, passing AAA. Black text fails at 1.34:1.

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

1.34:1
- AA fails
- AA large fails
- AAA fails
- APCA Lc 0
Text is here, unreadable at 1.34:1
White text on it

15.67:1
- AA passes
- AA large passes
- AAA passes
- APCA Lc −105
As text on black

1.34:1
- AA fails
- AA large fails
- AAA fails
- APCA Lc 0
Text is here, unreadable at 1.34:1
As text on white

15.67:1
- AA passes
- AA large passes
- AAA passes
- APCA Lc +102

Nearest versions that pass 4.5:1

For text on white

#1E213D 15.67:1

It already reaches 15.67:1 on white, so no change is needed.
For text on black

#6E7395 4.54:1

Lightening its OKLCH lightness from 0.26 to 0.57 reaches 4.54:1 on black, keeping the hue.

Compare both in the Contrast System

Checking another pair? Use the Contrast Checker.

Studio

Adjust #1E213D 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 #1E213D

Eleven OKLCH lightness steps at this hue, each with its contrast against white and black. #1E213D sits at step 900.

50#F2F4FF

White
1.09
Black
19.15
100#E6EAFF

White
1.19
Black
17.57
200#CFD5F7

White
1.44
Black
14.51
300#B5BBDE

White
1.88
Black
11.12
400#999FC2

White
2.59
Black
8.09
500#7E84A6

White
3.65
Black
5.73
600#676C8D

White
5.11
Black
4.10
700#515675

White
7.14
Black
2.93
800#393D59

White
10.57
Black
1.98
900This color#1E213D

White
15.67
Black
1.34
950#121428

White
18.15
Black
1.15

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

Gamut

How vivid #1E213D can get

At its lightness and hue, sRGB reaches OKLCH chroma 0.161; #1E213D uses 33% of it. Display P3 reaches no further at this hue.

sRGB
Display P3
Rec. 2020
Dominant wavelength

OKLCH chroma: 0.052
sRGB edge: 0.161
Display P3 edge: 0.163
Rec. 2020 edge: 0.174
Dominant wavelength: 467 nm
Excitation purity: 44%
Chromaticity: x 0.2325, y 0.2058

This color#1E213D
Most vivid in sRGB#1C006E
Most vivid in Display P3oklch(0.260 0.163 277.5)

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

Use the wider color where screens show it

.accent {
  color: #1e213d;
}
@media (color-gamut: p3) {
  .accent { color: color(display-p3 0.0966 0 0.4175); }
}

Mixing

Mixing #1E213D

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%#8F909E
OKLab50%#858899
OKLCH50%#858899

Black #000000

sRGB50%#0F111F
OKLab50%#050612
OKLCH50%#050612

Its complement #2B2401

sRGB50%#25231F
OKLab50%#242424
OKLCH50%#002B28

In CSS

/* A gradient and a mix, worked out in OKLCH */
background: linear-gradient(in oklch, #1e213d, white);
color: color-mix(in oklch, #1e213d 50%, white);

In use

#1E213D 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, 4.5:115.67:1 Passes
Link and body-size textText, 4.5:115.67:1 Passes
Large headingLarge text, 3:115.67:1 Passes
Icons, borders and focus ringsNon-text, 3:115.67:1 Passes

Dark page

Button labelText, 4.5:115.67:1 Passes
Link and body-size textText, 4.5:11.19:1 Fails
Large headingLarge text, 3:11.19:1 Fails
Icons, borders and focus ringsNon-text, 3:11.19:1 Fails

For text on this page, the nearest shade that passes is #757B9D 4.52:1

Color vision

How #1E213D looks with color blindness

Tritanopia changes it most, ΔE2000 16.7; deuteranopia changes it least, 4.3.

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

#17253E ΔE2000 4.8

Close match

Reads as very dark muted blue
Deuteranopia

No working green (medium-wavelength) cones

#14223C ΔE2000 4.3

Close match

Reads as very dark muted blue
Tritanopia

No working blue (short-wavelength) cones

#14272C ΔE2000 16.7

Distinct

Reads as very dark grayish blue
Achromatopsia

No cone color vision; lightness only

#232323 ΔE2000 14.5

Distinct

Reads as near-black

Pairing check

Checked against its complement, #2B2401. Their lightness contrast is only 1.01:1, so where hue collapses, add a label, icon or pattern.

Vision	The pair	ΔE2000	Verdict
Normal vision	#1E213D · #2B2401	30.9	Stays distinct
Protanopia	#17253E · #292300	28.9	Stays distinct
Deuteranopia	#14223C · #2B2503	29.6	Stays distinct
Tritanopia	#14272C · #2F201D	20.3	Stays distinct
Achromatopsia	#232323 · #242424	0.3	Easily confused

Harmony

Color harmonies for #1E213D

Its complement is #2B2401, a very dark muted brown, on the warm 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#1E213D
Complement#2B2401

Complementary

Open in Harmony Studio

−30°#0C263C
Base#1E213D
+30°#2B1D38

Analogous

Open in Harmony Studio

Base#1E213D
+120°#391A11
+240°#082B1A

Triadic

Open in Harmony Studio

Base#1E213D
+150°#351E04
+210°#1D290A

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-5013: #1e213d;
}

Tailwind config

// tailwind.config.js
module.exports = {
  theme: {
    extend: {
      colors: {
        'ral-5013': '#1e213d',
      },
    },
  },
};

Tailwind v4 theme

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

@theme {
  --color-ral-5013: oklch(0.260 0.052 277.5);
}

Design token (W3C DTCG)

{
  "color": {
    "ral-5013": {
      "$type": "color",
      "$value": {
        "colorSpace": "srgb",
        "components": [0.1176, 0.1294, 0.2392],
        "hex": "#1e213d"
      },
      "$description": "RAL 5013 Cobalt blue (approximate sRGB)"
    }
  }
}

SwiftUI color

import SwiftUI

enum Palette {
    static let ral5013 = Color(.sRGB, red: 0.118, green: 0.129, blue: 0.239, opacity: 1)
}

Jetpack Compose color

import androidx.compose.ui.graphics.Color

object Palette {
    val Ral5013 = Color(0xFF1E213D)
}

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 #1E213D 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 5013 Cobalt blue #1E213D

#1E213D color codes

Contrast: is #1E213D 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 #1E213D live

Shades and tints of #1E213D

How vivid #1E213D can get

Mixing #1E213D

#1E213D in an interface

How #1E213D looks with color blindness

Protanopia

Deuteranopia

Tritanopia

Achromatopsia

Pairing check

Color harmonies for #1E213D

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 #1E213D in the tools