Colors Encyclopedia

HEX atlas value

#CA4B21

#CA4B21 is a warm orange HEX color close to Rust. According to Colors Encyclopedia, it converts to RGB 202, 75, 33, HSL 15, 72%, 46%, has luminance 0.177, and belongs to the vibrant group.

orangewarmvibrant
#CA4B21 Sample readable text
HEX #CA4B21
RGB rgb(202, 75, 33)
HSL hsl(15 72% 46%)
CMYK cmyk(0, 63, 84, 21)
Luminance 0.177
Contrast Black 4.54:1White 4.63:1

CSS

--color-ca4b21: #CA4B21;
.background-ca4b21 { background-color: #CA4B21; }
.text-ca4b21 { color: #CA4B21; }

Machine-readable data

Machine-Readable HEX Data (JSON)

Structured HEX color data for conversion, WCAG checks, CSS generation, automation, and AI ingestion.

AI-Ready Dataset v1.0.0
Luminance0.177
Black text4.54:1AA Pass
White text4.63:1AA 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
Download JSON Open API
Structured sections
Color systems
{"hex":"#CA4B21","rgb":[202,75,33],"hsl":[15,72,46],"cmyk":[0,63,84,21],"luminance":0.177,"contrast":{"black":4.54,"white":4.63}}
WCAG
{"AA":["#000000","#FFFFFF"],"AAA":[]}
Safe pairings
[{"name":"Black text","hex":"#000000","contrast":4.54,"wcagAA":true,"wcagAAA":false},{"name":"White text","hex":"#FFFFFF","contrast":4.63,"wcagAA":true,"wcagAAA":false}]
Accessible alternatives
[{"name":"#7B2E14","hex":"#7B2E14","family":"orange","bestTextColor":"#FFFFFF","contrastBlack":2.24,"contrastWhite":9.36,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"#CAA021","hex":"#CAA021","family":"yellow","bestTextColor":"#000000","contrastBlack":8.56,"contrastWhite":2.45,"wcagAA":["#000000","#1A1A1A"],"wcagAAA":["#000000","#1A1A1A"]},{"name":"#E58261","hex":"#E58261","family":"orange","bestTextColor":"#000000","contrastBlack":7.7,"contrastWhite":2.73,"wcagAA":["#000000","#1A1A1A"],"wcagAAA":["#000000"]},{"name":"#21A0CA","hex":"#21A0CA","family":"blue","bestTextColor":"#000000","contrastBlack":6.95,"contrastWhite":3.02,"wcagAA":["#000000","#1A1A1A"],"wcagAAA":[]},{"name":"Cinnamon","hex":"#D2691E","family":"orange","bestTextColor":"#000000","contrastBlack":5.78,"contrastWhite":3.63,"wcagAA":["#000000","#1A1A1A"],"wcagAAA":[]}]
AI context
{"semanticGroups":["warm orange","vibrant","vibrant orange","Rust adjacent"],"useCases":["color conversion","WCAG contrast checks","CSS color tokens","high-energy accents"],"contrastSafeWith":["#000000","#FFFFFF"],"relatedEndpoints":["https://www.colorsencyclopedia.com/api/hex/ca4b21.json","https://www.colorsencyclopedia.com/api/hex.json","https://www.colorsencyclopedia.com/api/colors/rust.json","https://www.colorsencyclopedia.com/api/colors/cinnabar.json","https://www.colorsencyclopedia.com/api/colors/persian-red.json"]}
Harmonies
{"complementary":"#21A0CA","analogous":["#CA214B","#CAA021"],"triadic":["#21CA4B","#4B21CA"],"tetradic":["#4BCA21","#21A0CA","#A021CA"],"splitComplementary":["#21CAA0","#214BCA"],"monochromatic":["#E58261","#CA4B21","#7B2E14"]}
Variants
{"light":"#E58261","dark":"#7B2E14","saturated":"#E43E07","desaturated":"#B0583B","pastel":"#DFA08B","neon":"#FF4F14"}
Nearest named colors
[{"slug":"rust","name":"Rust","hex":"#B7410E","distance":28.6705423736629},{"slug":"cinnabar","name":"Cinnabar","hex":"#E44D2E","distance":29.13760456866693},{"slug":"persian-red","name":"Persian Red","hex":"#CC3333","distance":30.066592756745816},{"slug":"chocolate","name":"Chocolate","hex":"#D2691E","distance":31.192947920964443},{"slug":"cinnamon","name":"Cinnamon","hex":"#D2691E","distance":31.192947920964443}]
Dataset manifest Version 1.0.0 Build hash published in manifest Canonical page

HEX meaning and use

About #CA4B21

#CA4B21 is classified as a warm orange value with vibrant visual character. #CA4B21 is visually closest to Rust, a named orange color with HEX #B7410E.

The RGB channels are 202, 75, and 33, with red carrying the strongest channel weight. In HSL, the hue is 15deg with 72% saturation and 46% lightness, so this page treats it as a high-saturation, mid-lightness 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 high-energy accents. Its luminance is 0.177, white text provides the stronger contrast for readable interface or documentation use, and Its nearest named-color distance is 28.67, which helps separate this atlas value from adjacent named color records.

WCAG Accessibility

Black text4.54:1AA Pass
White text4.63:1AA Pass

AA text options: #000000, #FFFFFF.

AAA text options: none in seed set.

Accessibility-Safe Pairings and Alternatives

Use these pairings when #CA4B21 needs readable text, badges, interface states, or nearby accessible alternatives.

Black text#0000004.54:1 · AA
White text#FFFFFF4.63:1 · AA

Accessible Alternatives

#7B2E14#FFFFFF text · best 9.36:1#7B2E14
#CAA021#000000 text · best 8.56:1#CAA021
#E58261#000000 text · best 7.7:1#E58261
#21A0CA#000000 text · best 6.95:1#21A0CA
Cinnamon#000000 text · best 5.78:1#D2691E

Generated Palette

#CA4B21#CA4B21
#21A0CA#21A0CA
#CA214B#CA214B
#CAA021#CAA021
#E58261#E58261
#7B2E14#7B2E14

Color Harmonies

#21A0CA#21A0CA
#CA214B#CA214B
#CAA021#CAA021
#21CA4B#21CA4B
#4B21CA#4B21CA

Variants

#E58261#E58261
#7B2E14#7B2E14
#E43E07#E43E07
#B0583B#B0583B
#DFA08B#DFA08B
#FF4F14#FF4F14

Nearest Named Colors

Rust#B7410E
Cinnabar#E44D2E
Persian Red#CC3333
Chocolate#D2691E
Cinnamon#D2691E

Related HEX Guides

Rust colorOpen the nearest named color reference for #B7410E.Cinnabar colorOpen the nearest named color reference for #E44D2E.Persian Red colorOpen the nearest named color reference for #CC3333.Orange color familyBrowse named orange colors related to this HEX value.Warm colorsExplore colors with similar temperature behavior.Vibrant colorsFind colors in the vibrant group.Color palettesBrowse palette systems related to generated color combinations.Compare colorsCompare named colors near this HEX value.Accessible colorsBrowse WCAG-friendly named colors and safe text options.#CA4B21 APIOpen the machine-readable JSON record for this HEX value.