Colors Encyclopedia

HEX atlas value

#CA2421

#CA2421 is a warm red HEX color close to Persian Red. According to Colors Encyclopedia, it converts to RGB 202, 36, 33, HSL 1, 72%, 46%, has luminance 0.1393, and belongs to the vibrant group.

redwarmvibrant
#CA2421 Sample readable text
HEX #CA2421
RGB rgb(202, 36, 33)
HSL hsl(1 72% 46%)
CMYK cmyk(0, 82, 84, 21)
Luminance 0.1393
Contrast Black 3.79:1White 5.55:1

CSS

--color-ca2421: #CA2421;
.background-ca2421 { background-color: #CA2421; }
.text-ca2421 { color: #CA2421; }

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
Luminance0.1393
Black text3.79:1AA Fail
White text5.55:1AA 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":"#CA2421","rgb":[202,36,33],"hsl":[1,72,46],"cmyk":[0,82,84,21],"luminance":0.1393,"contrast":{"black":3.79,"white":5.55}}
WCAG
{"AA":["#FFFFFF","#F5F5F5"],"AAA":[]}
Safe pairings
[{"name":"Black text","hex":"#000000","contrast":3.79,"wcagAA":false,"wcagAAA":false},{"name":"White text","hex":"#FFFFFF","contrast":5.55,"wcagAA":true,"wcagAAA":false}]
Accessible alternatives
[{"name":"#7B1614","hex":"#7B1614","family":"red","bestTextColor":"#FFFFFF","contrastBlack":1.97,"contrastWhite":10.67,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"#21C7CA","hex":"#21C7CA","family":"cyan","bestTextColor":"#000000","contrastBlack":10.09,"contrastWhite":2.08,"wcagAA":["#000000","#1A1A1A","#36454F"],"wcagAAA":["#000000","#1A1A1A"]},{"name":"Tool Red","hex":"#B11226","family":"red","bestTextColor":"#FFFFFF","contrastBlack":2.98,"contrastWhite":7.04,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF"]},{"name":"Firebrick","hex":"#B22222","family":"red","bestTextColor":"#FFFFFF","contrastBlack":3.14,"contrastWhite":6.68,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":[]},{"name":"#E56361","hex":"#E56361","family":"red","bestTextColor":"#000000","contrastBlack":6.29,"contrastWhite":3.34,"wcagAA":["#000000","#1A1A1A"],"wcagAAA":[]}]
AI context
{"semanticGroups":["warm red","vibrant","vibrant red","Persian Red adjacent"],"useCases":["color conversion","WCAG contrast checks","CSS color tokens","high-energy accents","high-attention visual states"],"contrastSafeWith":["#FFFFFF","#F5F5F5"],"relatedEndpoints":["https://www.colorsencyclopedia.com/api/hex/ca2421.json","https://www.colorsencyclopedia.com/api/hex.json","https://www.colorsencyclopedia.com/api/colors/persian-red.json","https://www.colorsencyclopedia.com/api/colors/firebrick.json","https://www.colorsencyclopedia.com/api/colors/venetian-red.json"]}
Harmonies
{"complementary":"#21C7CA","analogous":["#CA2172","#CA7821"],"triadic":["#21CA24","#2421CA"],"tetradic":["#72CA21","#21C7CA","#7821CA"],"splitComplementary":["#21CA78","#2172CA"],"monochromatic":["#E56361","#CA2421","#7B1614"]}
Variants
{"light":"#E56361","dark":"#7B1614","saturated":"#E40B07","desaturated":"#B03D3B","pastel":"#DF8C8B","neon":"#FF1814"}
Nearest named colors
[{"slug":"persian-red","name":"Persian Red","hex":"#CC3333","distance":23.515952032609693},{"slug":"firebrick","name":"Firebrick","hex":"#B22222","distance":24.1039415863879},{"slug":"venetian-red","name":"Venetian Red","hex":"#C80815","distance":30.528675044947494},{"slug":"tool-red","name":"Tool Red","hex":"#B11226","distance":31.20897306865447},{"slug":"cherry-red","name":"Cherry Red","hex":"#D2042D","distance":35.09985754956849}]
Dataset manifest Version 1.0.0 Build hash published in manifest Canonical page

HEX meaning and use

About #CA2421

#CA2421 is classified as a warm red value with vibrant visual character. #CA2421 is visually closest to Persian Red, a named red color with HEX #CC3333.

The RGB channels are 202, 36, and 33, with red carrying the strongest channel weight. In HSL, the hue is 1deg 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 0.1393, white text provides the stronger contrast for readable interface or documentation use, and Its nearest named-color distance is 23.52, which helps separate this atlas value from adjacent named color records.

WCAG Accessibility

Black text3.79:1AA Fail
White text5.55:1AA Pass

AA text options: #FFFFFF, #F5F5F5.

AAA text options: none in seed set.

Accessibility-Safe Pairings and Alternatives

Use these pairings when #CA2421 needs readable text, badges, interface states, or nearby accessible alternatives.

Black text#0000003.79:1 · Fail
White text#FFFFFF5.55:1 · AA

Accessible Alternatives

#7B1614#FFFFFF text · best 10.67:1#7B1614
#21C7CA#000000 text · best 10.09:1#21C7CA
Tool Red#FFFFFF text · best 7.04:1#B11226
Firebrick#FFFFFF text · best 6.68:1#B22222
#E56361#000000 text · best 6.29:1#E56361

Generated Palette

#CA2421#CA2421
#21C7CA#21C7CA
#CA2172#CA2172
#CA7821#CA7821
#E56361#E56361
#7B1614#7B1614

Color Harmonies

#21C7CA#21C7CA
#CA2172#CA2172
#CA7821#CA7821
#21CA24#21CA24
#2421CA#2421CA

Variants

#E56361#E56361
#7B1614#7B1614
#E40B07#E40B07
#B03D3B#B03D3B
#DF8C8B#DF8C8B
#FF1814#FF1814

Nearest Named Colors

Persian Red#CC3333
Firebrick#B22222
Venetian Red#C80815
Tool Red#B11226
Cherry Red#D2042D

Related HEX Guides

Persian Red colorOpen the nearest named color reference for #CC3333.Firebrick colorOpen the nearest named color reference for #B22222.Venetian Red colorOpen the nearest named color reference for #C80815.Red color familyBrowse named red 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.#CA2421 APIOpen the machine-readable JSON record for this HEX value.