HEX atlas value

#21240F

#21240F is a warm yellow HEX color close to Carbon Fiber. According to Colors Encyclopedia, it converts to RGB 33, 36, 15, HSL 69, 41%, 10%, has luminance 0.0162, and belongs to the dark and earth tone groups.

yellow warm dark earth-tone

#21240F Sample readable text

HEX #21240F

RGB rgb(33, 36, 15)

HSL hsl(69 41% 10%)

CMYK cmyk(8, 0, 58, 86)

Luminance 0.0162

Contrast Black 1.32:1White 15.86:1

CSS

--color-21240f: #21240F;
.background-21240f { background-color: #21240F; }
.text-21240f { color: #21240F; }

Luminance0.0162

Black text1.32:1AA Fail

White text15.86:1AA 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":"#21240F","rgb":[33,36,15],"hsl":[69,41,10],"cmyk":[8,0,58,86],"luminance":0.0162,"contrast":{"black":1.32,"white":15.86}}

WCAG

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

Safe pairings

[{"name":"Black text","hex":"#000000","contrast":1.32,"wcagAA":false,"wcagAAA":false},{"name":"White text","hex":"#FFFFFF","contrast":15.86,"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":"#120F24","hex":"#120F24","family":"blue","bestTextColor":"#FFFFFF","contrastBlack":1.12,"contrastWhite":18.75,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"Matte Black","hex":"#1A1A1A","family":"gray","bestTextColor":"#FFFFFF","contrastBlack":1.21,"contrastWhite":17.41,"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":"#1D1E15","hex":"#1D1E15","family":"yellow","bestTextColor":"#FFFFFF","contrastBlack":1.25,"contrastWhite":16.83,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]}]

AI context

{"semanticGroups":["warm yellow","dark","earth tone","dark yellow","earth tone yellow","Carbon Fiber adjacent"],"useCases":["color conversion","WCAG contrast checks","CSS color tokens","natural palettes","dark theme accents","highlight and warning systems"],"contrastSafeWith":["#FFFFFF","#F5F5F5"],"relatedEndpoints":["https://www.colorsencyclopedia.com/api/hex/21240f.json","https://www.colorsencyclopedia.com/api/hex.json","https://www.colorsencyclopedia.com/api/colors/carbon-fiber.json","https://www.colorsencyclopedia.com/api/colors/matte-black.json","https://www.colorsencyclopedia.com/api/colors/raisin.json"]}

Harmonies

{"complementary":"#120F24","analogous":["#241D0F","#16240F"],"triadic":["#0F2124","#240F21"],"tetradic":["#0F241D","#120F24","#240F16"],"splitComplementary":["#0F1624","#1D0F24"],"monochromatic":["#5C652A","#21240F","#000000"]}

Variants

{"light":"#5C652A","dark":"#000000","saturated":"#252A09","desaturated":"#1D1E15","pastel":"#697042","neon":"#4E5C00"}

Nearest named colors

[{"slug":"carbon-fiber","name":"Carbon Fiber","hex":"#1C1C1C","distance":16.06237840420901},{"slug":"matte-black","name":"Matte Black","hex":"#1A1A1A","distance":16.431676725154983},{"slug":"raisin","name":"Raisin","hex":"#242124","distance":21.42428528562855},{"slug":"rubber","name":"Rubber","hex":"#2A2725","distance":23.958297101421877},{"slug":"slate-black","name":"Slate Black","hex":"#26282A","distance":27.748873851023216}]

HEX meaning and use

About #21240F

#21240F is classified as a warm yellow value with dark and earth tone visual character. #21240F is visually closest to Carbon Fiber, a named gray color with HEX #1C1C1C.

The RGB channels are 33, 36, and 15, with green carrying the strongest channel weight. In HSL, the hue is 69deg with 41% saturation and 10% lightness, so this page treats it as a moderate-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 0.0162, white text provides the stronger contrast for readable interface or documentation use, and Its nearest named-color distance is 16.06, which helps separate this atlas value from adjacent named color records.

WCAG Accessibility

Black text1.32:1AA Fail

White text15.86:1AA Pass

AA text options: #FFFFFF, #F5F5F5.

AAA text options: #FFFFFF, #F5F5F5.

Accessibility-Safe Pairings and Alternatives

Use these pairings when #21240F needs readable text, badges, interface states, or nearby accessible alternatives.

Black text#0000001.32:1 · Fail

White text#FFFFFF15.86:1 · AAA

Accessible Alternatives

Black#FFFFFF text · best 21:1#000000

#120F24#FFFFFF text · best 18.75:1#120F24

Matte Black#FFFFFF text · best 17.41:1#1A1A1A

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

#1D1E15#FFFFFF text · best 16.83:1#1D1E15

Generated Palette

#21240F#21240F

#120F24#120F24

#241D0F#241D0F

#16240F#16240F

#5C652A#5C652A

Black#000000

Color Harmonies

#120F24#120F24

#241D0F#241D0F

#16240F#16240F

#0F2124#0F2124

#240F21#240F21

Variants

#5C652A#5C652A

Black#000000

#252A09#252A09

#1D1E15#1D1E15

#697042#697042

#4E5C00#4E5C00

Nearest Named Colors

Carbon Fiber#1C1C1C

Matte Black#1A1A1A

Raisin#242124

Rubber#2A2725

Slate Black#26282A

#21240F

CSS

Machine-Readable HEX Data (JSON)

About #21240F

WCAG Accessibility

Accessibility-Safe Pairings and Alternatives

Accessible Alternatives

Generated Palette

Color Harmonies

Variants

Nearest Named Colors

Related HEX Guides