#63310D Color

#63310D is rgb(99, 49, 13) in RGB, hsl(25, 77%, 22%) in HSL, and about cmyk(0%, 51%, 87%, 61%) in CMYK. It has no registered color name of its own — the closest is Seal Brown (#59260B), clearly related but distinguishable side by side at ΔE 5.98. White text is the more readable choice on this background.

#63310D

HEX#63310D

RGBrgb(99, 49, 13)

HSLhsl(25, 77%, 22%)

HSVhsv(25, 87%, 39%)

CMYKcmyk(0%, 51%, 87%, 61%)

OKLCHoklch(37.3% 0.086 51.7)

LABlab(26.74% 21.13 31.78)

LCHlch(26.74% 38.17 56.38)

What #63310D 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 #63310D, ordered by CIE76 distance in CIELAB. Anything under about ΔE 2 is a difference most people cannot see.

Seal Brown#59260BΔE 5.98 Philippine Bronze#6E3A07ΔE 7.53 Sepia#704214ΔE 7.88 Pullman Brown(ups Brown)#644117ΔE 9.59 Kobicha#6B4423ΔE 10.18 Liver (Organ)#6C2E1FΔE 10.46

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

#63310D Channel Values

How #63310D 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 99 · G 49 · B 13	8-bit channels as sent to the display
HSL	H 25° · S 77% · L 22%	Easiest model for building lighter and darker variants
HSV	H 25° · S 87% · V 39%	Matches the picker in most design tools
CMYK	C 0% · M 51% · Y 87% · K 61%	Approximate ink mix; confirm with an ICC profile before printing
Luminance	10.63:1 vs white · 1.98:1 vs black	WCAG 2.2 relative-luminance contrast ratios

Text Contrast & Accessibility

WCAG 2.2 contrast ratios for text on a #63310D 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 text10.63:1AA normal AA large AAA normal

Fails AABlack text1.98:1AA normal AA large AAA normal

Need a specific ratio against another background? Open #63310D in the contrast checker.

Colors That Go With #63310D

Pairings derived from color-wheel relationships. The complementary color sits opposite #63310D; 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 #63310D

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 #63310D.

How #63310D 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#63310D

Protanopia#3D3D0C

Protanomaly#4F390C

Deuteranopia#464605

Deuteranomaly#533F08

Tritanopia#642E2E

Tritanomaly#642F24

Achromatopsia#3E3E3E

Test a full palette in the color blindness simulator.

Using #63310D in Code

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

CSS custom property--color-63310d: #63310D;

CSS backgroundbackground-color: #63310D;

Tailwind configcolors: { 'color-63310d': '#63310D' }

SwiftUIColor(red: 0.388, green: 0.192, blue: 0.051)

Android XML<color name="color_63310d">#63310D</color>

SVG fillfill="#63310D"

More Brown Colors

#63310D sits in the brown family. These are its neighbours across that family's full range, each with its own breakdown.

63331c 62310e 635147 5c5248 644117 5c3f19 652610 59260b 65401a 573800 654321 573500 6e3a07 7a5000 836953 8f4f00 996515 ad3100 bd7b00 cc7000 0c0a09 34240e 461901 503607

#63310D Frequently Asked Questions

What color is #63310D?

#63310D is a dark brown — rgb(99, 49, 13) in RGB and hsl(25, 77%, 22%) in HSL. It carries no registered color name of its own; the closest named color is Seal Brown (#59260B), which is clearly related but distinguishable side by side at a CIE76 distance of 5.98.

What is the RGB value of #63310D?

#63310D is rgb(99, 49, 13) — red 99, green 49, and blue 13 on the 0-255 scale.

What is the CMYK value of #63310D?

#63310D converts to approximately cmyk(0%, 51%, 87%, 61%). CMYK output is a mathematical approximation for planning; confirm production print colors with your printer and ICC profile.

Should text on #63310D be black or white?

White text is the more readable choice. #63310D scores 10.63:1 against white and 1.98:1 against black, and WCAG 2.2 asks for at least 4.5:1 for normal body text.

Can I write #63310D as a CSS color keyword?

No. #63310D 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 saddlebrown (#8B4513) at a CIE76 distance of 16.41, which is visibly different.

Open #63310D 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.