#1B1D01 Color

#1B1D01 is rgb(27, 29, 1) in RGB, hsl(64, 93%, 6%) in HSL, and about cmyk(7%, 0%, 97%, 89%) in CMYK. It has no registered color name of its own — the closest is Dark Olive (#3C341F), visibly different at ΔE 13.41. White text is the more readable choice on this background.

#1B1D01

HEX#1B1D01

RGBrgb(27, 29, 1)

HSLhsl(64, 93%, 6%)

HSVhsv(64, 97%, 11%)

CMYKcmyk(7%, 0%, 97%, 89%)

OKLCHoklch(22.1% 0.048 113.4)

LABlab(10.00% -4.69 14.30)

LCHlch(10.00% 15.05 108.17)

What #1B1D01 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 #1B1D01, ordered by CIE76 distance in CIELAB. Anything under about ΔE 2 is a difference most people cannot see.

Dark Olive#3C341FΔE 13.41 Dark Jungle Green#1A2421ΔE 14.18 Smoky Black#100C08ΔE 14.94 Eerie Black#1B1B1BΔE 15.05 Off Black#1A1A1AΔE 15.07 Zinnwaldite Brown#2C1608ΔE 15.16

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

#1B1D01 Channel Values

How #1B1D01 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 29 · B 1	8-bit channels as sent to the display
HSL	H 64° · S 93% · L 6%	Easiest model for building lighter and darker variants
HSV	H 64° · S 97% · V 11%	Matches the picker in most design tools
CMYK	C 7% · M 0% · Y 97% · K 89%	Approximate ink mix; confirm with an ICC profile before printing
Luminance	17.17:1 vs white · 1.22:1 vs black	WCAG 2.2 relative-luminance contrast ratios

Text Contrast & Accessibility

WCAG 2.2 contrast ratios for text on a #1B1D01 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 text17.17:1AA normal AA large AAA normal

Fails AABlack text1.22:1AA normal AA large AAA normal

Need a specific ratio against another background? Open #1B1D01 in the contrast checker.

Colors That Go With #1B1D01

Pairings derived from color-wheel relationships. The complementary color sits opposite #1B1D01; 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 #1B1D01

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

#1C1E01

#171901

#121401

Want a full 50-950 ramp with semantic roles? Generate design tokens from #1B1D01.

How #1B1D01 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#1B1D01

Protanopia#1D1D01

Protanomaly#1C1D01

Deuteranopia#1C1C01

Deuteranomaly#1C1D01

Tritanopia#1D1B1B

Tritanomaly#1C1C13

Achromatopsia#1B1B1B

Test a full palette in the color blindness simulator.

Using #1B1D01 in Code

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

CSS custom property--color-1b1d01: #1B1D01;

CSS backgroundbackground-color: #1B1D01;

Tailwind configcolors: { 'color-1b1d01': '#1B1D01' }

SwiftUIColor(red: 0.106, green: 0.114, blue: 0.004)

Android XML<color name="color_1b1d01">#1B1D01</color>

SVG fillfill="#1B1D01"

More Yellow Colors

#1B1D01 sits in the yellow family. These are its neighbours across that family's full range, each with its own breakdown.

181807 fffff5 1b1404 fffff0 1f1f00 ffffeb 242400 ffffe5 2a2913 ffffe0 2b2003 ffffd6 573a00 856514 b0a94f cc9900 e0e000 edeae0 f2f1e3 f8f3c9 fcfce8 ffcc00 fff000 ffff0f

#1B1D01 Frequently Asked Questions

What color is #1B1D01?

#1B1D01 is a darkest yellow — rgb(27, 29, 1) in RGB and hsl(64, 93%, 6%) in HSL. It carries no registered color name of its own; the closest named color is Dark Olive (#3C341F), which is visibly different at a CIE76 distance of 13.41.

What is the RGB value of #1B1D01?

#1B1D01 is rgb(27, 29, 1) — red 27, green 29, and blue 1 on the 0-255 scale.

What is the CMYK value of #1B1D01?

#1B1D01 converts to approximately cmyk(7%, 0%, 97%, 89%). CMYK output is a mathematical approximation for planning; confirm production print colors with your printer and ICC profile.

Should text on #1B1D01 be black or white?

White text is the more readable choice. #1B1D01 scores 17.17:1 against white and 1.22:1 against black, and WCAG 2.2 asks for at least 4.5:1 for normal body text.

Can I write #1B1D01 as a CSS color keyword?

No. #1B1D01 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 18.07, which is visibly different.

Open #1B1D01 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 yellow in the color library, the guide to shades of yellow, or the full color library.