#370B21 Color

#370B21 is rgb(55, 11, 33) in RGB, hsl(330, 67%, 13%) in HSL, and about cmyk(0%, 80%, 40%, 78%) in CMYK. It has no registered color name of its own — the closest is Light Chocolate Cosmos (#551F2F), visibly different at ΔE 12.15. White text is the more readable choice on this background.

#370B21

HEX#370B21

RGBrgb(55, 11, 33)

HSLhsl(330, 67%, 13%)

HSVhsv(330, 80%, 22%)

CMYKcmyk(0%, 80%, 40%, 78%)

OKLCHoklch(23.6% 0.074 353.5)

LABlab(10.42% 23.76 -2.87)

LCHlch(10.42% 23.93 353.11)

What #370B21 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 #370B21, ordered by CIE76 distance in CIELAB. Anything under about ΔE 2 is a difference most people cannot see.

Light Chocolate Cosmos#551F2FΔE 12.15 Temptress#3C2126ΔE 12.78 Dark Purple#301934ΔE 13.18 Dark Sienna#3C1414ΔE 13.96 Root Beer#290E05ΔE 16.08 Old Mauve#673147ΔE 18.23

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

#370B21 Channel Values

How #370B21 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 55 · G 11 · B 33	8-bit channels as sent to the display
HSL	H 330° · S 67% · L 13%	Easiest model for building lighter and darker variants
HSV	H 330° · S 80% · V 22%	Matches the picker in most design tools
CMYK	C 0% · M 80% · Y 40% · K 78%	Approximate ink mix; confirm with an ICC profile before printing
Luminance	17.04:1 vs white · 1.23:1 vs black	WCAG 2.2 relative-luminance contrast ratios

Text Contrast & Accessibility

WCAG 2.2 contrast ratios for text on a #370B21 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 text17.04:1AA normal AA large AAA normal

Fails AABlack text1.23:1AA normal AA large AAA normal

Need a specific ratio against another background? Open #370B21 in the contrast checker.

Colors That Go With #370B21

Pairings derived from color-wheel relationships. The complementary color sits opposite #370B21; 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 #370B21

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 #370B21.

How #370B21 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#370B21

Protanopia#181821

Protanomaly#281421

Deuteranopia#212120

Deuteranomaly#2B1A20

Tritanopia#360F0F

Tritanomaly#360E18

Achromatopsia#1C1C1C

Test a full palette in the color blindness simulator.

Using #370B21 in Code

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

CSS custom property--color-370b21: #370B21;

CSS backgroundbackground-color: #370B21;

Tailwind configcolors: { 'color-370b21': '#370B21' }

SwiftUIColor(red: 0.216, green: 0.043, blue: 0.129)

Android XML<color name="color_370b21">#370B21</color>

SVG fillfill="#370B21"

More Pink Colors

#370B21 sits in the pink family. These are its neighbours across that family's full range, each with its own breakdown.

200e15 fff5ff 240024 fff5f8 2e051f fff0ff 2f1d2f fff0f6 301934 fff0f5 330033 ffe0f0 57001d 754875 940094 a800b7 c43162 d07cd0 e0115f e936a7 f38fa9 fb64b6 ff0a85 ff70b8

#370B21 Frequently Asked Questions

What color is #370B21?

#370B21 is a darkest pink — rgb(55, 11, 33) in RGB and hsl(330, 67%, 13%) in HSL. It carries no registered color name of its own; the closest named color is Light Chocolate Cosmos (#551F2F), which is visibly different at a CIE76 distance of 12.15.

What is the RGB value of #370B21?

#370B21 is rgb(55, 11, 33) — red 55, green 11, and blue 33 on the 0-255 scale.

What is the CMYK value of #370B21?

#370B21 converts to approximately cmyk(0%, 80%, 40%, 78%). CMYK output is a mathematical approximation for planning; confirm production print colors with your printer and ICC profile.

Should text on #370B21 be black or white?

White text is the more readable choice. #370B21 scores 17.04:1 against white and 1.23:1 against black, and WCAG 2.2 asks for at least 4.5:1 for normal body text.

Can I write #370B21 as a CSS color keyword?

No. #370B21 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 black (#000000) at a CIE76 distance of 26.1, which is a different colour altogether.

Open #370B21 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 pink in the color library, the guide to shades of pink, or the full color library.