RAL Classic color

RAL 6011 Reseda green #57A639

RAL 6011 Reseda green is shown here as #57A639, a widely published sRGB approximation of the printed swatch. It is a soft green in the green family. In OKLCH it sits at lightness 0.651, chroma 0.164 and hue 138.3°. The nearest CSS named color is olivedrab (#6B8E23), ΔE2000 9.3 away.

Relative luminance
0.2959
OKLCH L · C · h
0.651 · 0.164 · 138.3
Best text
Black 6.91:1
Hue family
Green
Inspect this color Check contrast

#57A639 color codes

HEX
#57A639
RGB
rgb(87, 166, 57)
HSL
hsl(103, 49%, 44%)
OKLCH
oklch(0.651 0.164 138.3)
OKLab
oklab(0.651 -0.123 0.109)
CIELAB (D65)
L* 61.30, a* -44.45, b* 47.41
XYZ (D65)
X 18.30, Y 29.59, Z 8.62
CMYK (naive)
cmyk(48%, 0%, 66%, 35%)

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 #57A639 accessible?

Black text on it reaches 6.91:1, passing AA. White text manages only 3.03:1, 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

    6.91:1

    • AA passes
    • AA large passes
    • AAA fails
    • APCA Lc +47

  • White text on it

    3.03:1

    • AA fails
    • AA large passes
    • AAA fails
    • APCA Lc −62

  • As text on black

    6.91:1

    • AA passes
    • AA large passes
    • AAA fails
    • APCA Lc −44

  • As text on white

    3.03:1

    • AA fails
    • AA large passes
    • AAA fails
    • APCA Lc +56

Nearest versions that pass 4.5:1

  • For text on white

    #388710 4.52:1

    Darkening its OKLCH lightness from 0.65 to 0.55 reaches 4.52:1 on white, keeping the hue.

    Compare both in the Contrast System

  • For text on black

    #57A639 6.91:1

    It already reaches 6.91:1 on black, so no change is needed.

Checking another pair? Use the Contrast Checker.

Studio

Adjust #57A639 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 #57A639

Eleven OKLCH lightness steps at this hue, each with its contrast against white and black. #57A639 sits at step 500.

  1. 50#E3FFDA
    White
    1.07
    Black
    19.58
  2. 100#C3FFAF
    White
    1.15
    Black
    18.24
  3. 200#A7EE8F
    White
    1.37
    Black
    15.26
  4. 300#89D570
    White
    1.77
    Black
    11.81
  5. 400#6AB84F
    White
    2.44
    Black
    8.58
  6. 500This color#57A639
    White
    3.03
    Black
    6.91
  7. 600#35830A
    White
    4.77
    Black
    4.40
  8. 700#266900
    White
    6.76
    Black
    3.10
  9. 800#1A4D00
    White
    9.97
    Black
    2.10
  10. 900#0E3200
    White
    14.23
    Black
    1.47
  11. 950#051C00
    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 #57A639 can get

At its lightness and hue, sRGB reaches OKLCH chroma 0.202; #57A639 uses 81% of it. Display P3, which many recent phones and laptops show, reaches 0.238 there: 18% more.

0.00.20.40.60.80.20.40.60.8 460480500520540560580600620
  • sRGB
  • Display P3
  • Rec. 2020
  • Dominant wavelength
OKLCH chroma
0.164
sRGB edge
0.202
Display P3 edge
0.238
Rec. 2020 edge
0.247
Dominant wavelength
554 nm
Excitation purity
58%
Chromaticity
x 0.3239, y 0.5236
  • This color#57A639
  • Most vivid in sRGB#43AA00
  • Most vivid in Display P3oklch(0.651 0.238 138.3)

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

Use the wider color where screens show it
.accent {
  color: #57a639;
}
@media (color-gamut: p3) {
  .accent { color: color(display-p3 0.3358 0.6712 0); }
}

Mixing

Mixing #57A639

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%#ABD39C
  • OKLab50%#ACD39F
  • OKLCH50%#ACD39F

Black #000000

  • sRGB50%#2C531D
  • OKLab50%#1C3E10
  • OKLCH50%#1C3E10

Its complement #B96BCF

  • sRGB50%#888984
  • OKLab50%#90908F
  • OKLCH50%#DD6A1F
In CSS
/* A gradient and a mix, worked out in OKLCH */
background: linear-gradient(in oklch, #57a639, white);
color: color-mix(in oklch, #57a639 50%, white);

In use

#57A639 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, 4.5:16.91:1 Passes
  • Link and body-size textText, 4.5:13.03:1 Fails
  • Large headingLarge text, 3:13.03:1 Passes
  • Icons, borders and focus ringsNon-text, 3:13.03:1 Passes

For text on this page, the nearest shade that passes is #388710 4.52:1

Dark page

  • Button labelText, 4.5:16.91:1 Passes
  • Link and body-size textText, 4.5:16.17:1 Passes
  • Large headingLarge text, 3:16.17:1 Passes
  • Icons, borders and focus ringsNon-text, 3:16.17:1 Passes

Color vision

How #57A639 looks with color blindness

Achromatopsia changes it most, ΔE2000 26.6; deuteranopia changes it least, 19.8.

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

    #AB982B ΔE2000 21.2

    Distinct

    Reads as light soft amber

  • Deuteranopia

    No working green (medium-wavelength) cones

    #A09142 ΔE2000 19.8

    Distinct

    Reads as soft amber

  • Tritanopia

    No working blue (short-wavelength) cones

    #51A08F ΔE2000 20.4

    Distinct

    Reads as muted cyan

  • Achromatopsia

    No cone color vision; lightness only

    #949494 ΔE2000 26.6

    Distinct

    Reads as gray

Pairing check

Checked against its complement, #B96BCF. Their lightness contrast is only 1.14:1, so where hue collapses, add a label, icon or pattern.

VisionThe pairΔE2000Verdict
Normal vision#57A639 · #B96BCF77.2Stays distinct
Protanopia#AB982B · #5985D253.4Stays distinct
Deuteranopia#A09142 · #708DCC46.7Stays distinct
Tritanopia#51A08F · #B9799343.8Stays distinct
Achromatopsia#949494 · #8A8A8A3.4Easily confused

Harmony

Color harmonies for #57A639

Its complement is #B96BCF, a soft magenta.

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

Open the Harmony Studio
  • Base#57A639
  • Complement#B96BCF

Complementary

Open in Harmony Studio
  • −30°#989500
  • Base#57A639
  • +30°#00A980

Analogous

Open in Harmony Studio
  • Base#57A639
  • +120°#4B8EF2
  • +240°#E25E68

Triadic

Open in Harmony Studio
  • Base#57A639
  • +150°#8D7BEC
  • +210°#D560A1

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-6011: #57a639;
}

Tailwind config

// tailwind.config.js
module.exports = {
  theme: {
    extend: {
      colors: {
        'ral-6011': '#57a639',
      },
    },
  },
};

Tailwind v4 theme

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

@theme {
  --color-ral-6011: oklch(0.651 0.164 138.3);
}

Design token (W3C DTCG)

{
  "color": {
    "ral-6011": {
      "$type": "color",
      "$value": {
        "colorSpace": "srgb",
        "components": [0.3412, 0.651, 0.2235],
        "hex": "#57a639"
      },
      "$description": "RAL 6011 Reseda green (approximate sRGB)"
    }
  }
}

SwiftUI color

import SwiftUI

enum Palette {
    static let ral6011 = Color(.sRGB, red: 0.341, green: 0.651, blue: 0.224, opacity: 1)
}

Jetpack Compose color

import androidx.compose.ui.graphics.Color

object Palette {
    val Ral6011 = Color(0xFF57A639)
}

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 #57A639 in the tools

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