Tailwind CSS v3 color

Tailwind amber-700 #B45309

Tailwind CSS v3's amber-700 is #B45309. It is a soft orange in the brown family. In OKLCH it sits at lightness 0.555, chroma 0.146 and hue 49.0°. The nearest CSS named color is sienna (#A0522D), ΔE2000 7.1 away.

Relative luminance
0.1591
OKLCH L · C · h
0.555 · 0.146 · 49.0
Best text
White 5.02:1
Hue family
Brown
Inspect this color Check contrast

#B45309 color codes

HEX
#B45309
RGB
rgb(180, 83, 9)
HSL
hsl(26, 90%, 37%)
OKLCH
oklch(0.555 0.146 49.0)
OKLab
oklab(0.555 0.095 0.110)
CIELAB (D65)
L* 46.86, a* 35.90, b* 54.13
XYZ (D65)
X 21.97, Y 15.91, Z 2.17
CMYK (naive)
cmyk(0%, 54%, 95%, 29%)

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 #B45309 accessible?

White text on it reaches 5.02:1, passing AA. Black text manages only 4.18:1, 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

    4.18:1

    • AA fails
    • AA large passes
    • AAA fails
    • APCA Lc +30

  • White text on it

    5.02:1

    • AA passes
    • AA large passes
    • AAA fails
    • APCA Lc −79

  • As text on black

    4.18:1

    • AA fails
    • AA large passes
    • AAA fails
    • APCA Lc −27

  • As text on white

    5.02:1

    • AA passes
    • AA large passes
    • AAA fails
    • APCA Lc +74

Nearest versions that pass 4.5:1

  • For text on white

    #B45309 5.02:1

    It already reaches 5.02:1 on white, so no change is needed.

  • For text on black

    #BB5915 4.55:1

    Lightening its OKLCH lightness from 0.56 to 0.58 reaches 4.55:1 on black, keeping the hue.

    Compare both in the Contrast System

Checking another pair? Use the Contrast Checker.

Studio

Adjust #B45309 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 #B45309

Eleven OKLCH lightness steps at this hue, each with its contrast against white and black. #B45309 sits at step 600.

  1. 50#FFF2EC
    White
    1.09
    Black
    19.16
  2. 100#FFE5D8
    White
    1.20
    Black
    17.45
  3. 200#FFCBAF
    White
    1.45
    Black
    14.41
  4. 300#FFA473
    White
    1.94
    Black
    10.80
  5. 400#E88349
    White
    2.70
    Black
    7.77
  6. 500#CA6728
    White
    3.83
    Black
    5.48
  7. 600This color#B45309
    White
    5.02
    Black
    4.18
  8. 700#8C3E00
    White
    7.48
    Black
    2.80
  9. 800#682C00
    White
    10.77
    Black
    1.94
  10. 900#451B00
    White
    14.89
    Black
    1.40
  11. 950#290C00
    White
    18.31
    Black
    1.14

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

Tailwind CSS v3 amber scale

The real Tailwind palette, for comparison with the computed ramp above.

  1. 50#FFFBEB
    White
    1.03
    Black
    20.25
  2. 100#FEF3C7
    White
    1.11
    Black
    18.85
  3. 200#FDE68A
    White
    1.24
    Black
    16.86
  4. 300#FCD34D
    White
    1.44
    Black
    14.56
  5. 400#FBBF24
    White
    1.66
    Black
    12.57
  6. 500#F59E0B
    White
    2.14
    Black
    9.77
  7. 600#D97706
    White
    3.18
    Black
    6.59
  8. 700This color#B45309
    White
    5.02
    Black
    4.18
  9. 800#92400E
    White
    7.09
    Black
    2.96
  10. 900#78350F
    White
    9.07
    Black
    2.31
  11. 950#451A03
    White
    14.97
    Black
    1.40

Gamut

How vivid #B45309 can get

At its lightness and hue, sRGB reaches OKLCH chroma 0.149; #B45309 uses 98% of it. Display P3, which many recent phones and laptops show, reaches 0.169 there: 14% more.

0.00.20.40.60.80.20.40.60.8 460480500520540560580600620
  • sRGB
  • Display P3
  • Rec. 2020
  • Dominant wavelength
OKLCH chroma
0.146
sRGB edge
0.149
Display P3 edge
0.169
Rec. 2020 edge
0.171
Dominant wavelength
593 nm
Excitation purity
85%
Chromaticity
x 0.5485, y 0.3973
  • This color#B45309
  • Most vivid in sRGB#B55200
  • Most vivid in Display P3oklch(0.555 0.169 49.0)

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

Use the wider color where screens show it
.accent {
  color: #b45309;
}
@media (color-gamut: p3) {
  .accent { color: color(display-p3 0.6884 0.3204 0); }
}

Mixing

Mixing #B45309

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%#DAA984
  • OKLab50%#DEA98E
  • OKLCH50%#DEA98E

Black #000000

  • sRGB50%#5A2A05
  • OKLab50%#441B01
  • OKLCH50%#441B01

Its complement #007EA6

  • sRGB50%#5A6958
  • OKLab50%#7C706A
  • OKLCH50%#9358A2
In CSS
/* A gradient and a mix, worked out in OKLCH */
background: linear-gradient(in oklch, #b45309, white);
color: color-mix(in oklch, #b45309 50%, white);

In use

#B45309 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, 4.5:15.02:1 Passes
  • Link and body-size textText, 4.5:15.02:1 Passes
  • Large headingLarge text, 3:15.02:1 Passes
  • Icons, borders and focus ringsNon-text, 3:15.02:1 Passes

Dark page

  • Button labelText, 4.5:15.02:1 Passes
  • Link and body-size textText, 4.5:13.73:1 Fails
  • Large headingLarge text, 3:13.73:1 Passes
  • Icons, borders and focus ringsNon-text, 3:13.73:1 Passes

For text on this page, the nearest shade that passes is #C36120 4.50:1

Color vision

How #B45309 looks with color blindness

Achromatopsia changes it most, ΔE2000 26.5; tritanopia changes it least, 20.6.

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

    #6F6100 ΔE2000 25.5

    Distinct

    Reads as soft brown

  • Deuteranopia

    No working green (medium-wavelength) cones

    #877703 ΔE2000 26.2

    Distinct

    Reads as soft amber

  • Tritanopia

    No working blue (short-wavelength) cones

    #C63C47 ΔE2000 20.6

    Distinct

    Reads as vivid red

  • Achromatopsia

    No cone color vision; lightness only

    #6F6F6F ΔE2000 26.5

    Distinct

    Reads as gray

Pairing check

Checked against its complement, #007EA6. Their lightness contrast is only 1.08:1, so where hue collapses, add a label, icon or pattern.

VisionThe pairΔE2000Verdict
Normal vision#B45309 · #007EA648.7Stays distinct
Protanopia#6F6100 · #697CA844.6Stays distinct
Deuteranopia#877703 · #566FA548.3Stays distinct
Tritanopia#C63C47 · #00898B54.4Stays distinct
Achromatopsia#6F6F6F · #7575752.4Easily confused

Harmony

Color harmonies for #B45309

Its complement is #007EA6, a 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#B45309
  • Complement#007EA6

Complementary

Open in Harmony Studio
  • −30°#B94850
  • Base#B45309
  • +30°#976900

Analogous

Open in Harmony Studio
  • Base#B45309
  • +120°#008768
  • +240°#7261C2

Triadic

Open in Harmony Studio
  • Base#B45309
  • +150°#008388
  • +210°#3A71C7

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-amber-700: #b45309;
}

Tailwind config

// tailwind.config.js — already built in as amber-700;
// pin the v3 value explicitly like this:
module.exports = {
  theme: {
    extend: {
      colors: {
        amber: { 700: '#b45309' },
      },
    },
  },
};

Tailwind v4 theme

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

@theme {
  /* v4 has its own amber-700; this pins the v3 value. */
  --color-amber-700: oklch(0.555 0.146 49.0);
}

Design token (W3C DTCG)

{
  "color": {
    "amber-700": {
      "$type": "color",
      "$value": {
        "colorSpace": "srgb",
        "components": [0.7059, 0.3255, 0.0353],
        "hex": "#b45309"
      },
      "$description": "Tailwind CSS v3 amber-700"
    }
  }
}

SwiftUI color

import SwiftUI

enum Palette {
    static let amber700 = Color(.sRGB, red: 0.706, green: 0.325, blue: 0.035, opacity: 1)
}

Jetpack Compose color

import androidx.compose.ui.graphics.Color

object Palette {
    val Amber700 = Color(0xFFB45309)
}

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 #B45309 in the tools

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