CSS named color

Dark Orange #FF8C00

The CSS keyword darkorange is #FF8C00. It is a light vivid orange in the orange family. In OKLCH it sits at lightness 0.751, chroma 0.179 and hue 58.3°.

Relative luminance: 0.4002
OKLCH L · C · h: 0.751 · 0.179 · 58.3
Best text: Black 9.00:1
Hue family: Orange

Inspect this color Check contrast

#FF8C00 color codes

HEX: #FF8C00
RGB: rgb(255, 140, 0)
HSL: hsl(33, 100%, 50%)
OKLCH: oklch(0.751 0.179 58.3)
OKLab: oklab(0.751 0.094 0.152)
CIELAB (D65): L* 69.49, a* 36.83, b* 75.49
XYZ (D65): X 50.62, Y 40.02, Z 5.06
CMYK (naive): cmyk(0%, 45%, 100%, 0%)

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.

Legibility

Contrast: is #FF8C00 accessible?

Black text on it reaches 9.00:1, passing AAA. White text fails at 2.33:1.

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

9.00:1
- AA passes
- AA large passes
- AAA passes
- APCA Lc +58
White text on it

2.33:1
- AA fails
- AA large fails
- AAA fails
- APCA Lc −50
As text on black

9.00:1
- AA passes
- AA large passes
- AAA passes
- APCA Lc −56
As text on white

2.33:1
- AA fails
- AA large fails
- AAA fails
- APCA Lc +45

Nearest versions that pass 4.5:1

For text on white

#B36000 4.57:1

Darkening its OKLCH lightness from 0.75 to 0.58 reaches 4.57:1 on white, keeping the hue.

Compare both in the Contrast System
For text on black

#FF8C00 9.00:1

It already reaches 9.00:1 on black, so no change is needed.

Checking another pair? Use the Contrast Checker.

Studio

Adjust #FF8C00 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 #FF8C00

Eleven OKLCH lightness steps at this hue, each with its contrast against white and black. #FF8C00 sits at step 400.

50#FFF2E9

White
1.09
Black
19.12
100#FFE6D4

White
1.19
Black
17.52
200#FFCCA5

White
1.45
Black
14.43
300#FFA65D

White
1.93
Black
10.86
400This color#FF8C00

White
2.33
Black
9.00
500#C66B00

White
3.81
Black
5.50
600#A45800

White
5.28
Black
3.97
700#844500

White
7.41
Black
2.83
800#613200

White
10.68
Black
1.96
900#411F00

White
14.78
Black
1.42
950#260F00

White
18.24
Black
1.15

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

Gamut

How vivid #FF8C00 can get

At its lightness and hue, sRGB reaches OKLCH chroma 0.179; #FF8C00 uses 100% of it. Display P3, which many recent phones and laptops show, reaches 0.205 there: 14% more.

sRGB
Display P3
Rec. 2020
Dominant wavelength

OKLCH chroma: 0.179
sRGB edge: 0.179
Display P3 edge: 0.205
Rec. 2020 edge: 0.207
Dominant wavelength: 588 nm
Excitation purity: 85%
Chromaticity: x 0.5290, y 0.4182

This color#FF8C00
Most vivid in sRGB#FF8C00
Most vivid in Display P3oklch(0.751 0.205 58.3)

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

Use the wider color where screens show it

.accent {
  color: #ff8c00;
}
@media (color-gamut: p3) {
  .accent { color: color(display-p3 0.9732 0.5484 0); }
}

Mixing

Mixing #FF8C00

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%#FFC680
OKLab50%#FFC89B
OKLCH50%#FFCAA1

Black #000000

sRGB50%#804600
OKLab50%#633300
OKLCH50%#633300

Its complement #3EBAFF

sRGB50%#9FA380
OKLab50%#B7ACA4
OKLCH50%#59CA71

In CSS

/* A gradient and a mix, worked out in OKLCH */
background: linear-gradient(in oklch, #ff8c00, white);
color: color-mix(in oklch, #ff8c00 50%, white);

In use

#FF8C00 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, 4.5:19.00:1 Passes
Link and body-size textText, 4.5:12.33:1 Fails
Large headingLarge text, 3:12.33:1 Fails
Icons, borders and focus ringsNon-text, 3:12.33:1 Fails

For text on this page, the nearest shade that passes is #B36000 4.57:1

Dark page

Button labelText, 4.5:19.00:1 Passes
Link and body-size textText, 4.5:18.03:1 Passes
Large headingLarge text, 3:18.03:1 Passes
Icons, borders and focus ringsNon-text, 3:18.03:1 Passes

Color vision

How #FF8C00 looks with color blindness

Achromatopsia changes it most, ΔE2000 29.1; protanopia changes it least, 24.3.

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

#AF9900 ΔE2000 24.3

Distinct

Reads as light soft amber
Deuteranopia

No working green (medium-wavelength) cones

#CAB400 ΔE2000 25.5

Distinct

Reads as light soft yellow
Tritanopia

No working blue (short-wavelength) cones

#FF7177 ΔE2000 28.9

Distinct

Reads as light vivid red
Achromatopsia

No cone color vision; lightness only

#AAAAAA ΔE2000 29.1

Distinct

Reads as light gray

Pairing check

Checked against its complement, #3EBAFF. Their lightness contrast is only 1.07:1, so where hue collapses, add a label, icon or pattern.

Vision	The pair	ΔE2000	Verdict
Normal vision	#FF8C00 · #3EBAFF	52.6	Stays distinct
Protanopia	#AF9900 · #99BAFF	53.2	Stays distinct
Deuteranopia	#CAB400 · #7FA8FE	58.1	Stays distinct
Tritanopia	#FF7177 · #00CCD2	59.1	Stays distinct
Achromatopsia	#AAAAAA · #B0B0B0	1.7	Easily confused

Harmony

Color harmonies for #FF8C00

Its complement is #3EBAFF, 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#FF8C00
Complement#3EBAFF

Complementary

Open in Harmony Studio

−30°#FF8577
Base#FF8C00
+30°#D6A700

Analogous

Open in Harmony Studio

Base#FF8C00
+120°#00CAAF
+240°#BA98FF

Triadic

Open in Harmony Studio

Base#FF8C00
+150°#00C4D9
+210°#8CAAFF

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-darkorange: #ff8c00;
}

Tailwind config

// tailwind.config.js
module.exports = {
  theme: {
    extend: {
      colors: {
        darkorange: '#ff8c00',
      },
    },
  },
};

Tailwind v4 theme

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

@theme {
  --color-darkorange: oklch(0.751 0.179 58.3);
}

Design token (W3C DTCG)

{
  "color": {
    "darkorange": {
      "$type": "color",
      "$value": {
        "colorSpace": "srgb",
        "components": [1, 0.549, 0],
        "hex": "#ff8c00"
      },
      "$description": "CSS named color darkorange"
    }
  }
}

SwiftUI color

import SwiftUI

enum Palette {
    static let darkorange = Color(.sRGB, red: 1.000, green: 0.549, blue: 0.000, opacity: 1)
}

Jetpack Compose color

import androidx.compose.ui.graphics.Color

object Palette {
    val Darkorange = Color(0xFFFF8C00)
}

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 #FF8C00 in the tools

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

Dark Orange #FF8C00

#FF8C00 color codes

Contrast: is #FF8C00 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 #FF8C00 live

Shades and tints of #FF8C00

How vivid #FF8C00 can get

Mixing #FF8C00

#FF8C00 in an interface

How #FF8C00 looks with color blindness

Protanopia

Deuteranopia

Tritanopia

Achromatopsia

Pairing check

Color harmonies for #FF8C00

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 #FF8C00 in the tools