#1B311C Color

#1B311C is rgb(27, 49, 28) in RGB, hsl(123, 29%, 15%) in HSL, and about cmyk(45%, 0%, 43%, 81%) in CMYK. It has no registered color name of its own — the closest is Phthalo Green (#123524), clearly related but distinguishable side by side at ΔE 5.46. White text is the more readable choice on this background.

#1B311C

HEX#1B311C

RGBrgb(27, 49, 28)

HSLhsl(123, 29%, 15%)

HSVhsv(123, 45%, 19%)

CMYKcmyk(45%, 0%, 43%, 81%)

OKLCHoklch(28.8% 0.047 145.3)

LABlab(17.99% -13.22 10.58)

LCHlch(17.99% 16.93 141.33)

What #1B311C 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 #1B311C, ordered by CIE76 distance in CIELAB. Anything under about ΔE 2 is a difference most people cannot see.

Phthalo Green#123524ΔE 5.46 Medium Jungle Green#1C352DΔE 9.02 Sacramento State Green#043927ΔE 9.42 Kombu Green#354230ΔE 9.71 MSU Green#18453BΔE 13.3 Rifle Green#414833ΔE 13.5

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

#1B311C Channel Values

How #1B311C 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 27 · G 49 · B 28	8-bit channels as sent to the display
HSL	H 123° · S 29% · L 15%	Easiest model for building lighter and darker variants
HSV	H 123° · S 45% · V 19%	Matches the picker in most design tools
CMYK	C 45% · M 0% · Y 43% · K 81%	Approximate ink mix; confirm with an ICC profile before printing
Luminance	13.97:1 vs white · 1.5:1 vs black	WCAG 2.2 relative-luminance contrast ratios

Text Contrast & Accessibility

WCAG 2.2 contrast ratios for text on a #1B311C 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 text13.97:1AA normal AA large AAA normal

Fails AABlack text1.5:1AA normal AA large AAA normal

Need a specific ratio against another background? Open #1B311C in the contrast checker.

Colors That Go With #1B311C

Pairings derived from color-wheel relationships. The complementary color sits opposite #1B311C; 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 #1B311C

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 #1B311C.

How #1B311C 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#1B311C

Protanopia#2E2E1C

Protanomaly#282F1C

Deuteranopia#2B2B1D

Deuteranomaly#252E1C

Tritanopia#1F2F2F

Tritanomaly#1D3028

Achromatopsia#2C2C2C

Test a full palette in the color blindness simulator.

Using #1B311C in Code

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

CSS custom property--color-1b311c: #1B311C;

CSS backgroundbackground-color: #1B311C;

Tailwind configcolors: { 'color-1b311c': '#1B311C' }

SwiftUIColor(red: 0.106, green: 0.192, blue: 0.110)

Android XML<color name="color_1b311c">#1B311C</color>

SVG fillfill="#1B311C"

More Green Colors

#1B311C sits in the green family. These are its neighbours across that family's full range, each with its own breakdown.

000200 fdfff5 001f00 f7fee7 002400 f7fbf5 002c22 f5fffa 002e00 f5fff5 003300 f0fff0 008000 00db87 0d542b 20483f 33cc66 46c399 5ea500 728639 91e0b7 a3f5d8 bcd7bc d1ffed

#1B311C Frequently Asked Questions

What color is #1B311C?

#1B311C is a darkest green — rgb(27, 49, 28) in RGB and hsl(123, 29%, 15%) in HSL. It carries no registered color name of its own; the closest named color is Phthalo Green (#123524), which is clearly related but distinguishable side by side at a CIE76 distance of 5.46.

What is the RGB value of #1B311C?

#1B311C is rgb(27, 49, 28) — red 27, green 49, and blue 28 on the 0-255 scale.

What is the CMYK value of #1B311C?

#1B311C converts to approximately cmyk(45%, 0%, 43%, 81%). CMYK output is a mathematical approximation for planning; confirm production print colors with your printer and ICC profile.

Should text on #1B311C be black or white?

White text is the more readable choice. #1B311C scores 13.97:1 against white and 1.5:1 against black, and WCAG 2.2 asks for at least 4.5:1 for normal body text.

Can I write #1B311C as a CSS color keyword?

No. #1B311C 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 darkslategray (#2F4F4F) at a CIE76 distance of 19.61, which is visibly different.

Open #1B311C 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 green in the color library, the guide to shades of green, or the full color library.