HEX atlas value

#1B2C23

#1B2C23 is a cool green HEX color close to Slate Black. According to Colors Encyclopedia, it converts to RGB 27, 44, 35, HSL 148, 24%, 14%, has luminance 0.0216, and belongs to the dark and earth tone groups.

green cool dark earth-tone

#1B2C23 Sample readable text

HEX #1B2C23

RGB rgb(27, 44, 35)

HSL hsl(148 24% 14%)

CMYK cmyk(39, 0, 20, 83)

Luminance 0.0216

Contrast Black 1.43:1White 14.66:1

CSS

--color-1b2c23: #1B2C23;
.background-1b2c23 { background-color: #1B2C23; }
.text-1b2c23 { color: #1B2C23; }

Luminance0.0216

Black text1.43:1AA Fail

White text14.66:1AA Pass

hexCanonical HEX value

rgbRed, green, blue channels

hslHue, saturation, lightness

cmykApproximate print conversion

wcagAA and AAA contrast options

harmoniesMathematical harmony sets

variantsGenerated tone variants

nearestColorsKnowledge graph neighbors

Structured sections

Color systems

{"hex":"#1B2C23","rgb":[27,44,35],"hsl":[148,24,14],"cmyk":[39,0,20,83],"luminance":0.0216,"contrast":{"black":1.43,"white":14.66}}

WCAG

{"AA":["#FFFFFF","#F5F5F5"],"AAA":["#FFFFFF","#F5F5F5"]}

Safe pairings

[{"name":"Black text","hex":"#000000","contrast":1.43,"wcagAA":false,"wcagAAA":false},{"name":"White text","hex":"#FFFFFF","contrast":14.66,"wcagAA":true,"wcagAAA":true}]

Accessible alternatives

[{"name":"Black","hex":"#000000","family":"gray","bestTextColor":"#FFFFFF","contrastBlack":1,"contrastWhite":21,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"Carbon Fiber","hex":"#1C1C1C","family":"gray","bestTextColor":"#FFFFFF","contrastBlack":1.23,"contrastWhite":17.05,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"#2C1B24","hex":"#2C1B24","family":"pink","bestTextColor":"#FFFFFF","contrastBlack":1.29,"contrastWhite":16.28,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"Raisin","hex":"#242124","family":"gray","bestTextColor":"#FFFFFF","contrastBlack":1.32,"contrastWhite":15.93,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"#232424","hex":"#232424","family":"gray","bestTextColor":"#FFFFFF","contrastBlack":1.35,"contrastWhite":15.56,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]}]

AI context

{"semanticGroups":["cool green","dark","earth tone","dark green","earth tone green","Slate Black adjacent"],"useCases":["color conversion","WCAG contrast checks","CSS color tokens","natural palettes","dark theme accents","botanical and wellness palettes"],"contrastSafeWith":["#FFFFFF","#F5F5F5"],"relatedEndpoints":["https://www.colorsencyclopedia.com/api/hex/1b2c23.json","https://www.colorsencyclopedia.com/api/hex.json","https://www.colorsencyclopedia.com/api/colors/slate-black.json","https://www.colorsencyclopedia.com/api/colors/raisin.json","https://www.colorsencyclopedia.com/api/colors/rubber.json"]}

Harmonies

{"complementary":"#2C1B24","analogous":["#1C2C1B","#1B2C2C"],"triadic":["#231B2C","#2C231B"],"tetradic":["#1B1C2C","#2C1B24","#2C2C1B"],"splitComplementary":["#2C1B2C","#2C1B1C"],"monochromatic":["#3E6550","#1B2C23","#000000"]}

Variants

{"light":"#3E6550","dark":"#000000","saturated":"#133423","desaturated":"#232424","pastel":"#5A6C63","neon":"#007034"}

Nearest named colors

[{"slug":"slate-black","name":"Slate Black","hex":"#26282A","distance":13.638181696985855},{"slug":"raisin","name":"Raisin","hex":"#242124","distance":14.247806848775006},{"slug":"rubber","name":"Rubber","hex":"#2A2725","distance":15.937377450509228},{"slug":"carbon-fiber","name":"Carbon Fiber","hex":"#1C1C1C","distance":17.4928556845359},{"slug":"asphalt","name":"Asphalt","hex":"#2B2B2B","distance":17.916472867168917}]

HEX meaning and use

About #1B2C23

#1B2C23 is classified as a cool green value with dark and earth tone visual character. #1B2C23 is visually closest to Slate Black, a named gray color with HEX #26282A.

The RGB channels are 27, 44, and 35, with green carrying the strongest channel weight. In HSL, the hue is 148deg with 24% saturation and 14% lightness, so this page treats it as a low-saturation, dark atlas color rather than a generic swatch.

According to Colors Encyclopedia, this HEX value works best for color conversion, WCAG contrast checks, CSS color tokens, and natural palettes. Its luminance is 0.0216, white text provides the stronger contrast for readable interface or documentation use, and Its nearest named-color distance is 13.64, which helps separate this atlas value from adjacent named color records.

WCAG Accessibility

Black text1.43:1AA Fail

White text14.66:1AA Pass

AA text options: #FFFFFF, #F5F5F5.

AAA text options: #FFFFFF, #F5F5F5.

Accessibility-Safe Pairings and Alternatives

Use these pairings when #1B2C23 needs readable text, badges, interface states, or nearby accessible alternatives.

Black text#0000001.43:1 · Fail

White text#FFFFFF14.66:1 · AAA

Accessible Alternatives

Black#FFFFFF text · best 21:1#000000

Carbon Fiber#FFFFFF text · best 17.05:1#1C1C1C

#2C1B24#FFFFFF text · best 16.28:1#2C1B24

Raisin#FFFFFF text · best 15.93:1#242124

#232424#FFFFFF text · best 15.56:1#232424

Generated Palette

#1B2C23#1B2C23

#2C1B24#2C1B24

#1C2C1B#1C2C1B

#1B2C2C#1B2C2C

#3E6550#3E6550

Black#000000

Color Harmonies

#2C1B24#2C1B24

#1C2C1B#1C2C1B

#1B2C2C#1B2C2C

#231B2C#231B2C

#2C231B#2C231B

Variants

#3E6550#3E6550

Black#000000

#133423#133423

#232424#232424

#5A6C63#5A6C63

#007034#007034

Nearest Named Colors

Slate Black#26282A

Raisin#242124

Rubber#2A2725

Carbon Fiber#1C1C1C

Asphalt#2B2B2B

#1B2C23

CSS

Machine-Readable HEX Data (JSON)

About #1B2C23

WCAG Accessibility

Accessibility-Safe Pairings and Alternatives

Accessible Alternatives

Generated Palette

Color Harmonies

Variants

Nearest Named Colors

Related HEX Guides