#CB3F10 Color

#CB3F10 is rgb(203, 63, 16) in RGB, hsl(15, 85%, 43%) in HSL, and about cmyk(0%, 69%, 92%, 20%) in CMYK. It has no registered color name of its own — the closest is Sinopia (#CB410B), below the threshold most people can see at ΔE 1.79. White text is the more readable choice on this background.

#CB3F10

HEX#CB3F10

RGBrgb(203, 63, 16)

HSLhsl(15, 85%, 43%)

HSVhsv(15, 92%, 80%)

CMYKcmyk(0%, 69%, 92%, 20%)

OKLCHoklch(56.7% 0.184 36.4)

LABlab(48.11% 54.87 55.88)

LCHlch(48.11% 78.32 45.52)

What #CB3F10 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 #CB3F10, ordered by CIE76 distance in CIELAB. Anything under about ΔE 2 is a difference most people cannot see.

Sinopia#CB410BΔE 1.79 Lemon Iced Tea#BD3000ΔE 4.77 Mahogany#C04000ΔE 5.11 Vermilion (Medium)#D9381EΔE 7.73 Flame#E25822ΔE 8.27 Rust#B7410EΔE 9.15

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

#CB3F10 Channel Values

How #CB3F10 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 203 · G 63 · B 16	8-bit channels as sent to the display
HSL	H 15° · S 85% · L 43%	Easiest model for building lighter and darker variants
HSV	H 15° · S 92% · V 80%	Matches the picker in most design tools
CMYK	C 0% · M 69% · Y 92% · K 20%	Approximate ink mix; confirm with an ICC profile before printing
Luminance	4.93:1 vs white · 4.26:1 vs black	WCAG 2.2 relative-luminance contrast ratios

Text Contrast & Accessibility

WCAG 2.2 contrast ratios for text on a #CB3F10 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 text4.93:1AA normal AA large AAA normal

Fails AABlack text4.26:1AA normal AA large AAA normal

Need a specific ratio against another background? Open #CB3F10 in the contrast checker.

Colors That Go With #CB3F10

Pairings derived from color-wheel relationships. The complementary color sits opposite #CB3F10; 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 #CB3F10

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 #CB3F10.

How #CB3F10 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#CB3F10

Protanopia#6A6A09

Protanomaly#9A5B0C

Deuteranopia#848400

Deuteranomaly#A56F00

Tritanopia#CC3B3B

Tritanomaly#CC3D2F

Achromatopsia#707070

Test a full palette in the color blindness simulator.

Using #CB3F10 in Code

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

CSS custom property--color-cb3f10: #CB3F10;

CSS backgroundbackground-color: #CB3F10;

Tailwind configcolors: { 'color-cb3f10': '#CB3F10' }

SwiftUIColor(red: 0.796, green: 0.247, blue: 0.063)

Android XML<color name="color_cb3f10">#CB3F10</color>

SVG fillfill="#CB3F10"

More Brown Colors

#CB3F10 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

#CB3F10 Frequently Asked Questions

What color is #CB3F10?

#CB3F10 is a mid-tone brown — rgb(203, 63, 16) in RGB and hsl(15, 85%, 43%) in HSL. It carries no registered color name of its own; the closest named color is Sinopia (#CB410B), which is below the threshold most people can see at a CIE76 distance of 1.79.

What is the RGB value of #CB3F10?

#CB3F10 is rgb(203, 63, 16) — red 203, green 63, and blue 16 on the 0-255 scale.

What is the CMYK value of #CB3F10?

#CB3F10 converts to approximately cmyk(0%, 69%, 92%, 20%). CMYK output is a mathematical approximation for planning; confirm production print colors with your printer and ICC profile.

Should text on #CB3F10 be black or white?

White text is the more readable choice. #CB3F10 scores 4.93:1 against white and 4.26:1 against black, and WCAG 2.2 asks for at least 4.5:1 for normal body text.

Can I write #CB3F10 as a CSS color keyword?

No. #CB3F10 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 tomato (#FF6347) at a CIE76 distance of 17.48, which is visibly different.

Open #CB3F10 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.