RAL Classic color

RAL 5024 Pastel blue #5D9B9B

RAL 5024 Pastel blue is shown here as #5D9B9B, a widely published sRGB approximation of the printed swatch. It is a muted cyan in the cyan family. In OKLCH it sits at lightness 0.648, chroma 0.064 and hue 195.7°. The nearest CSS named color is cadetblue (#5F9EA0), ΔE2000 1.3 away.

Relative luminance
0.2814
OKLCH L · C · h
0.648 · 0.064 · 195.7
Best text
Black 6.62:1
Hue family
Cyan
Inspect this color Check contrast

#5D9B9B color codes

HEX
#5D9B9B
RGB
rgb(93, 155, 155)
HSL
hsl(180, 25%, 49%)
OKLCH
oklch(0.648 0.064 195.7)
OKLab
oklab(0.648 -0.062 -0.017)
CIELAB (D65)
L* 60.01, a* -19.94, b* -6.30
XYZ (D65)
X 22.15, Y 28.13, Z 35.27
CMYK (naive)
cmyk(40%, 0%, 0%, 39%)

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 #5D9B9B accessible?

Black text on it reaches 6.62:1, passing AA. White text manages only 3.16:1, 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

    6.62:1

    • AA passes
    • AA large passes
    • AAA fails
    • APCA Lc +45

  • White text on it

    3.16:1

    • AA fails
    • AA large passes
    • AAA fails
    • APCA Lc −64

  • As text on black

    6.62:1

    • AA passes
    • AA large passes
    • AAA fails
    • APCA Lc −43

  • As text on white

    3.16:1

    • AA fails
    • AA large passes
    • AAA fails
    • APCA Lc +58

Nearest versions that pass 4.5:1

  • For text on white

    #428080 4.53:1

    Darkening its OKLCH lightness from 0.65 to 0.56 reaches 4.53:1 on white, keeping the hue.

    Compare both in the Contrast System

  • For text on black

    #5D9B9B 6.62:1

    It already reaches 6.62:1 on black, so no change is needed.

Checking another pair? Use the Contrast Checker.

Studio

Adjust #5D9B9B 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 #5D9B9B

Eleven OKLCH lightness steps at this hue, each with its contrast against white and black. #5D9B9B sits at step 500.

  1. 50#D4FFFF
    White
    1.07
    Black
    19.54
  2. 100#C3F7F6
    White
    1.16
    Black
    17.95
  3. 200#ACE4E3
    White
    1.40
    Black
    14.96
  4. 300#90CACA
    White
    1.82
    Black
    11.48
  5. 400#71AEAE
    White
    2.50
    Black
    8.36
  6. 500This color#5D9B9B
    White
    3.16
    Black
    6.62
  7. 600#3D7A7B
    White
    4.92
    Black
    4.26
  8. 700#266363
    White
    6.89
    Black
    3.04
  9. 800#0A494A
    White
    10.17
    Black
    2.06
  10. 900#003030
    White
    14.32
    Black
    1.46
  11. 950#001B1B
    White
    17.90
    Black
    1.17

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

Gamut

How vivid #5D9B9B can get

At its lightness and hue, sRGB reaches OKLCH chroma 0.110; #5D9B9B uses 58% of it. Display P3, which many recent phones and laptops show, reaches 0.148 there: 34% more.

0.00.20.40.60.80.20.40.60.8 460480500520540560580600620
  • sRGB
  • Display P3
  • Rec. 2020
  • Dominant wavelength
OKLCH chroma
0.064
sRGB edge
0.110
Display P3 edge
0.148
Rec. 2020 edge
0.241
Dominant wavelength
491 nm
Excitation purity
20%
Chromaticity
x 0.2589, y 0.3289
  • This color#5D9B9B
  • Most vivid in sRGB#00A3A4
  • Most vivid in Display P3oklch(0.648 0.148 195.7)

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

Use the wider color where screens show it
.accent {
  color: #5d9b9b;
}
@media (color-gamut: p3) {
  .accent { color: color(display-p3 0 0.6491 0.6649); }
}

Mixing

Mixing #5D9B9B

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%#AECDCD
  • OKLab50%#AECCCC
  • OKLCH50%#AECCCC

Black #000000

  • sRGB50%#2F4E4E
  • OKLab50%#1F3939
  • OKLCH50%#1F3939

Its complement #B27F81

  • sRGB50%#888D8E
  • OKLab50%#8E8E8E
  • OKLCH50%#939163
In CSS
/* A gradient and a mix, worked out in OKLCH */
background: linear-gradient(in oklch, #5d9b9b, white);
color: color-mix(in oklch, #5d9b9b 50%, white);

In use

#5D9B9B 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, 4.5:16.62:1 Passes
  • Link and body-size textText, 4.5:13.16:1 Fails
  • Large headingLarge text, 3:13.16:1 Passes
  • Icons, borders and focus ringsNon-text, 3:13.16:1 Passes

For text on this page, the nearest shade that passes is #428080 4.53:1

Dark page

  • Button labelText, 4.5:16.62:1 Passes
  • Link and body-size textText, 4.5:15.91:1 Passes
  • Large headingLarge text, 3:15.91:1 Passes
  • Icons, borders and focus ringsNon-text, 3:15.91:1 Passes

Color vision

How #5D9B9B looks with color blindness

Deuteranopia changes it most, ΔE2000 19.5; tritanopia changes it least, 4.4.

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

    #94969B ΔE2000 18.2

    Distinct

    Reads as gray

  • Deuteranopia

    No working green (medium-wavelength) cones

    #888D9C ΔE2000 19.5

    Distinct

    Reads as grayish blue

  • Tritanopia

    No working blue (short-wavelength) cones

    #429F9B ΔE2000 4.4

    Close match

    Reads as muted cyan

  • Achromatopsia

    No cone color vision; lightness only

    #919191 ΔE2000 17.9

    Distinct

    Reads as gray

Pairing check

Checked against its complement, #B27F81. Their lightness contrast is only 1.06:1, so where hue collapses, add a label, icon or pattern.

VisionThe pairΔE2000Verdict
Normal vision#5D9B9B · #B27F8139.8Stays distinct
Protanopia#94969B · #8886817.8Harder to tell apart
Deuteranopia#888D9C · #94908016.0Stays distinct
Tritanopia#429F9B · #BC7A8045.1Stays distinct
Achromatopsia#919191 · #8C8C8C1.7Easily confused

Harmony

Color harmonies for #5D9B9B

Its complement is #B27F81, a muted red, 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#5D9B9B
  • Complement#B27F81

Complementary

Open in Harmony Studio
  • −30°#689B85
  • Base#5D9B9B
  • +30°#6397AC

Analogous

Open in Harmony Studio
  • Base#5D9B9B
  • +120°#9E83A9
  • +240°#A58962

Triadic

Open in Harmony Studio
  • Base#5D9B9B
  • +150°#AC7F97
  • +210°#B0836E

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-5024: #5d9b9b;
}

Tailwind config

// tailwind.config.js
module.exports = {
  theme: {
    extend: {
      colors: {
        'ral-5024': '#5d9b9b',
      },
    },
  },
};

Tailwind v4 theme

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

@theme {
  --color-ral-5024: oklch(0.648 0.064 195.7);
}

Design token (W3C DTCG)

{
  "color": {
    "ral-5024": {
      "$type": "color",
      "$value": {
        "colorSpace": "srgb",
        "components": [0.3647, 0.6078, 0.6078],
        "hex": "#5d9b9b"
      },
      "$description": "RAL 5024 Pastel blue (approximate sRGB)"
    }
  }
}

SwiftUI color

import SwiftUI

enum Palette {
    static let ral5024 = Color(.sRGB, red: 0.365, green: 0.608, blue: 0.608, opacity: 1)
}

Jetpack Compose color

import androidx.compose.ui.graphics.Color

object Palette {
    val Ral5024 = Color(0xFF5D9B9B)
}

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 #5D9B9B in the tools

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