RAL Classic color

RAL 1037 Sun yellow #F3A505

RAL 1037 Sun yellow is shown here as #F3A505, a widely published sRGB approximation of the printed swatch. It is a light soft orange in the orange family. In OKLCH it sits at lightness 0.779, chroma 0.164 and hue 74.9°. The nearest CSS named color is orange (#FFA500), ΔE2000 2.8 away.

Relative luminance
0.4598
OKLCH L · C · h
0.779 · 0.164 · 74.9
Best text
Black 10.19:1
Hue family
Orange
Inspect this color Check contrast

#F3A505 color codes

HEX
#F3A505
RGB
rgb(243, 165, 5)
HSL
hsl(40, 96%, 49%)
OKLCH
oklch(0.779 0.164 74.9)
OKLab
oklab(0.779 0.043 0.158)
CIELAB (D65)
L* 73.53, a* 18.91, b* 76.76
XYZ (D65)
X 50.45, Y 45.98, Z 6.36
CMYK (naive)
cmyk(0%, 32%, 98%, 5%)

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 #F3A505 accessible?

Black text on it reaches 10.19:1, passing AAA. White text fails at 2.05:1.

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

    10.19:1

    • AA passes
    • AA large passes
    • AAA passes
    • APCA Lc +64

  • White text on it

    2.05:1

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

  • As text on black

    10.19:1

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

  • As text on white

    2.05:1

    • AA fails
    • AA large fails
    • AAA fails
    • APCA Lc +39

Nearest versions that pass 4.5:1

  • For text on white

    #A06B00 4.56:1

    Darkening its OKLCH lightness from 0.78 to 0.57 reaches 4.56:1 on white, keeping the hue.

    Compare both in the Contrast System

  • For text on black

    #F3A505 10.19:1

    It already reaches 10.19:1 on black, so no change is needed.

Checking another pair? Use the Contrast Checker.

Studio

Adjust #F3A505 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 #F3A505

Eleven OKLCH lightness steps at this hue, each with its contrast against white and black. #F3A505 sits at step 300.

  1. 50#FFF3E4
    White
    1.09
    Black
    19.19
  2. 100#FFE7C8
    White
    1.19
    Black
    17.51
  3. 200#FFCE8B
    White
    1.45
    Black
    14.45
  4. 300This color#F3A505
    White
    2.05
    Black
    10.19
  5. 400#D79100
    White
    2.64
    Black
    7.93
  6. 500#B37900
    White
    3.71
    Black
    5.65
  7. 600#956300
    White
    5.16
    Black
    4.06
  8. 700#774F00
    White
    7.23
    Black
    2.90
  9. 800#583900
    White
    10.49
    Black
    2.00
  10. 900#3A2400
    White
    14.66
    Black
    1.43
  11. 950#211300
    White
    18.13
    Black
    1.15

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

Gamut

How vivid #F3A505 can get

At its lightness and hue, sRGB reaches OKLCH chroma 0.164; #F3A505 uses 100% of it. Display P3, which many recent phones and laptops show, reaches 0.189 there: 15% 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
0.164
Display P3 edge
0.189
Rec. 2020 edge
0.192
Dominant wavelength
582 nm
Excitation purity
83%
Chromaticity
x 0.4908, y 0.4473
  • This color#F3A505
  • Most vivid in sRGB#F3A500
  • Most vivid in Display P3oklch(0.779 0.189 74.9)

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

Use the wider color where screens show it
.accent {
  color: #f3a505;
}
@media (color-gamut: p3) {
  .accent { color: color(display-p3 0.9361 0.6465 0); }
}

Mixing

Mixing #F3A505

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%#F9D282
  • OKLab50%#FBD39E
  • OKLCH50%#FBD39E

Black #000000

  • sRGB50%#7A5303
  • OKLab50%#5E3D01
  • OKLCH50%#5E3D01

Its complement #84BAFF

  • sRGB50%#BCB082
  • OKLab50%#C1B5A6
  • OKLCH50%#F591CB
In CSS
/* A gradient and a mix, worked out in OKLCH */
background: linear-gradient(in oklch, #f3a505, white);
color: color-mix(in oklch, #f3a505 50%, white);

In use

#F3A505 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, 4.5:110.19:1 Passes
  • Link and body-size textText, 4.5:12.05:1 Fails
  • Large headingLarge text, 3:12.05:1 Fails
  • Icons, borders and focus ringsNon-text, 3:12.05:1 Fails

For text on this page, the nearest shade that passes is #A06B00 4.56:1

Dark page

  • Button labelText, 4.5:110.19:1 Passes
  • Link and body-size textText, 4.5:19.09:1 Passes
  • Large headingLarge text, 3:19.09:1 Passes
  • Icons, borders and focus ringsNon-text, 3:19.09:1 Passes

Color vision

How #F3A505 looks with color blindness

Tritanopia changes it most, ΔE2000 33.0; protanopia changes it least, 14.5.

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

    #C1A900 ΔE2000 14.5

    Distinct

    Reads as light soft amber

  • Deuteranopia

    No working green (medium-wavelength) cones

    #D3BC14 ΔE2000 15.3

    Distinct

    Reads as light soft yellow

  • Tritanopia

    No working blue (short-wavelength) cones

    #FF908D ΔE2000 33.0

    Distinct

    Reads as light soft red

  • Achromatopsia

    No cone color vision; lightness only

    #B5B5B5 ΔE2000 28.5

    Distinct

    Reads as light gray

Pairing check

Checked against its complement, #84BAFF. Their lightness contrast is only 1.02:1, so where hue collapses, add a label, icon or pattern.

VisionThe pairΔE2000Verdict
Normal vision#F3A505 · #84BAFF50.5Stays distinct
Protanopia#C1A900 · #9FBDFF52.9Stays distinct
Deuteranopia#D3BC14 · #90B1FE56.2Stays distinct
Tritanopia#FF908D · #4CC9D250.3Stays distinct
Achromatopsia#B5B5B5 · #B7B7B70.5Easily confused

Harmony

Color harmonies for #F3A505

Its complement is #84BAFF, a light soft blue, 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#F3A505
  • Complement#84BAFF

Complementary

Open in Harmony Studio
  • −30°#FF996A
  • Base#F3A505
  • +30°#C8BB0A

Analogous

Open in Harmony Studio
  • Base#F3A505
  • +120°#00D1D1
  • +240°#DE94FE

Triadic

Open in Harmony Studio
  • Base#F3A505
  • +150°#00C9FD
  • +210°#AFACFF

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-1037: #f3a505;
}

Tailwind config

// tailwind.config.js
module.exports = {
  theme: {
    extend: {
      colors: {
        'ral-1037': '#f3a505',
      },
    },
  },
};

Tailwind v4 theme

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

@theme {
  --color-ral-1037: oklch(0.779 0.164 74.9);
}

Design token (W3C DTCG)

{
  "color": {
    "ral-1037": {
      "$type": "color",
      "$value": {
        "colorSpace": "srgb",
        "components": [0.9529, 0.6471, 0.0196],
        "hex": "#f3a505"
      },
      "$description": "RAL 1037 Sun yellow (approximate sRGB)"
    }
  }
}

SwiftUI color

import SwiftUI

enum Palette {
    static let ral1037 = Color(.sRGB, red: 0.953, green: 0.647, blue: 0.020, opacity: 1)
}

Jetpack Compose color

import androidx.compose.ui.graphics.Color

object Palette {
    val Ral1037 = Color(0xFFF3A505)
}

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 #F3A505 in the tools

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