#B1510B Color

#B1510B is rgb(177, 81, 11) in RGB, hsl(25, 88%, 37%) in HSL, and about cmyk(0%, 54%, 94%, 31%) in CMYK. It has no registered color name of its own — the closest is Windsor Tan (#A75502), clearly related but distinguishable side by side at ΔE 6.28. White text is the more readable choice on this background.

#B1510B

HEX#B1510B

RGBrgb(177, 81, 11)

HSLhsl(25, 88%, 37%)

HSVhsv(25, 94%, 69%)

CMYKcmyk(0%, 54%, 94%, 31%)

OKLCHoklch(54.8% 0.144 48.5)

LABlab(46.58% 37.57 53.61)

LCHlch(46.58% 65.46 54.98)

What #B1510B Is Called

Most hex codes have no name: there are 16.7 million of them and a few thousand registered names. These are the named colors nearest to #B1510B, ordered by CIE76 distance in CIELAB. Anything under about ΔE 2 is a difference most people cannot see.

Windsor Tan#A75502ΔE 6.28 Metallic Brown#AC4313ΔE 7.86 Alloy Orange#C46210ΔE 7.92 Light Brown#B5651DΔE 9.72 Rust#B7410EΔE 9.86 Chocolate#D2691EΔE 10.92

Browse the full index of named colors A-Z or every brown in the library.

#B1510B Channel Values

How #B1510B breaks down in each color model. Hue is measured in degrees around the color wheel; saturation, lightness, and the CMYK inks are percentages.

Model	Channels	Notes
RGB	R 177 · G 81 · B 11	8-bit channels as sent to the display
HSL	H 25° · S 88% · L 37%	Easiest model for building lighter and darker variants
HSV	H 25° · S 94% · V 69%	Matches the picker in most design tools
CMYK	C 0% · M 54% · Y 94% · K 31%	Approximate ink mix; confirm with an ICC profile before printing
Luminance	5.18:1 vs white · 4.05:1 vs black	WCAG 2.2 relative-luminance contrast ratios

Text Contrast & Accessibility

WCAG 2.2 contrast ratios for text on a #B1510B background. AA requires 4.5:1 for normal text and 3:1 for large text; AAA requires 7:1. Contrast is one check, not a full accessibility review.

TextWhite text5.18:1AA normal AA large AAA normal

Fails AABlack text4.05:1AA normal AA large AAA normal

Need a specific ratio against another background? Open #B1510B in the contrast checker.

Colors That Go With #B1510B

Pairings derived from color-wheel relationships. The complementary color sits opposite #B1510B; analogous colors sit beside it; triadic and split-complementary sets spread evenly around the wheel. Select any swatch for its own breakdown.

Base

Complementary

Analogous

Analogous

Triadic

Triadic

Split comp.

Split comp.

Tints & Shades of #B1510B

Lighter tints and darker shades built by moving the lightness channel while holding hue and saturation, which is what you want for hover states, backgrounds, and text variants.

Tints

Shades

Want a full 50-950 ramp with semantic roles? Generate design tokens from #B1510B.

How #B1510B Looks with Color Vision Deficiency

Simulated with the Viénot, Brettel & Mollon LMS projection model. Anomalous types are rendered as partial versions of the matching dichromacy, which is an approximation rather than a per-person clinical model.

Typical#B1510B

Protanopia#6A6A06

Protanomaly#8C6108

Deuteranopia#7C7C00

Deuteranomaly#946D00

Tritanopia#B34C4C

Tritanomaly#B24E3C

Achromatopsia#6D6D6D

Test a full palette in the color blindness simulator.

Using #B1510B in Code

Copy-ready declarations for the places this color usually ends up.

CSS custom property--color-b1510b: #B1510B;

CSS backgroundbackground-color: #B1510B;

Tailwind configcolors: { 'color-b1510b': '#B1510B' }

SwiftUIColor(red: 0.694, green: 0.318, blue: 0.043)

Android XML<color name="color_b1510b">#B1510B</color>

SVG fillfill="#B1510B"

More Brown Colors

#B1510B sits in the brown family. These are its neighbours across that family's full range, each with its own breakdown.

100c08 e17100 1b0d04 e15501 1c1917 e05e00 1f0800 e04000 1f1400 db8f00 241205 db7900 34240e 461901 503607 5c3f19 693507 7a2100 825221 8b6f47 993300 a8732e bd3000 cc3300

#B1510B Frequently Asked Questions

What color is #B1510B?

#B1510B is a dark brown — rgb(177, 81, 11) in RGB and hsl(25, 88%, 37%) in HSL. It carries no registered color name of its own; the closest named color is Windsor Tan (#A75502), which is clearly related but distinguishable side by side at a CIE76 distance of 6.28.

What is the RGB value of #B1510B?

#B1510B is rgb(177, 81, 11) — red 177, green 81, and blue 11 on the 0-255 scale.

What is the CMYK value of #B1510B?

#B1510B converts to approximately cmyk(0%, 54%, 94%, 31%). CMYK output is a mathematical approximation for planning; confirm production print colors with your printer and ICC profile.

Should text on #B1510B be black or white?

White text is the more readable choice. #B1510B scores 5.18:1 against white and 4.05:1 against black, and WCAG 2.2 asks for at least 4.5:1 for normal body text.

Can I write #B1510B as a CSS color keyword?

No. #B1510B is not one of the CSS color keywords, so it has to be written as a hex, rgb() or hsl() value. The closest keyword is chocolate (#D2691E) at a CIE76 distance of 10.92, which is visibly different.

Open #B1510B in a Tool

Hex to RGB Hex to HSL Hex to CMYK Hex to OKLCH Hex to Pantone Build a palette Make a gradient

Keep exploring: every brown in the color library, the guide to shades of brown, or the full color library.