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
#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.
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.
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.
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.
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.
- 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.
.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
/* 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.
| Vision | The pair | ΔE2000 | Verdict |
|---|---|---|---|
| Normal vision | #B45309 · #007EA6 | 48.7 | Stays distinct |
| Protanopia | #6F6100 · #697CA8 | 44.6 | Stays distinct |
| Deuteranopia | #877703 · #566FA5 | 48.3 | Stays distinct |
| Tritanopia | #C63C47 · #00898B | 54.4 | Stays distinct |
| Achromatopsia | #6F6F6F · #757575 | 2.4 | Easily 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 StudioCode
Design tokens
Ready-to-paste tokens in six formats. Rename them to fit your system.
:root {
--color-amber-700: #b45309;
}// tailwind.config.js — already built in as amber-700;
// pin the v3 value explicitly like this:
module.exports = {
theme: {
extend: {
colors: {
amber: { 700: '#b45309' },
},
},
},
};/* 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);
}{
"color": {
"amber-700": {
"$type": "color",
"$value": {
"colorSpace": "srgb",
"components": [0.7059, 0.3255, 0.0353],
"hex": "#b45309"
},
"$description": "Tailwind CSS v3 amber-700"
}
}
}import SwiftUI
enum Palette {
static let amber700 = Color(.sRGB, red: 0.706, green: 0.325, blue: 0.035, opacity: 1)
}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.
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.
- Color InspectorEvery format, its names, contrast and color vision in one panel.
- Contrast SystemBlack and white text on this color, with fixes in both directions.
- Harmony StudioPalettes built from this color, walked to a contrast target if you ask.
- Color Space ConverterThe same color in 34 notations, with its gamut headroom.
- Color Name FinderThe nearest of 1,055 color names by ΔE2000.