HEX atlas value

#CA3721

#CA3721 is a warm red HEX color close to Persian Red. According to Colors Encyclopedia, it converts to RGB 202, 55, 33, HSL 8, 72%, 46%, has luminance 0.154, and belongs to the vibrant group.

red warm vibrant

#CA3721 Sample readable text

HEX #CA3721

RGB rgb(202, 55, 33)

HSL hsl(8 72% 46%)

CMYK cmyk(0, 73, 84, 21)

Luminance 0.154

Contrast Black 4.08:1White 5.15:1

CSS

--color-ca3721: #CA3721;
.background-ca3721 { background-color: #CA3721; }
.text-ca3721 { color: #CA3721; }

Luminance0.154

Black text4.08:1AA Fail

White text5.15:1AA 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":"#CA3721","rgb":[202,55,33],"hsl":[8,72,46],"cmyk":[0,73,84,21],"luminance":0.154,"contrast":{"black":4.08,"white":5.15}}

WCAG

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

Safe pairings

[{"name":"Black text","hex":"#000000","contrast":4.08,"wcagAA":false,"wcagAAA":false},{"name":"White text","hex":"#FFFFFF","contrast":5.15,"wcagAA":true,"wcagAAA":false}]

Accessible alternatives

[{"name":"#7B2214","hex":"#7B2214","family":"red","bestTextColor":"#FFFFFF","contrastBlack":2.08,"contrastWhite":10.09,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"#21B3CA","hex":"#21B3CA","family":"cyan","bestTextColor":"#000000","contrastBlack":8.37,"contrastWhite":2.51,"wcagAA":["#000000","#1A1A1A"],"wcagAAA":["#000000"]},{"name":"#CA8C21","hex":"#CA8C21","family":"orange","bestTextColor":"#000000","contrastBlack":7.28,"contrastWhite":2.88,"wcagAA":["#000000","#1A1A1A"],"wcagAAA":["#000000"]},{"name":"#E57361","hex":"#E57361","family":"red","bestTextColor":"#000000","contrastBlack":6.96,"contrastWhite":3.02,"wcagAA":["#000000","#1A1A1A"],"wcagAAA":[]},{"name":"Firebrick","hex":"#B22222","family":"red","bestTextColor":"#FFFFFF","contrastBlack":3.14,"contrastWhite":6.68,"wcagAA":["#FFFFFF","#F5F5F5"],"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/ca3721.json","https://www.colorsencyclopedia.com/api/hex.json","https://www.colorsencyclopedia.com/api/colors/persian-red.json","https://www.colorsencyclopedia.com/api/colors/rust.json","https://www.colorsencyclopedia.com/api/colors/poppy-red.json"]}

Harmonies

{"complementary":"#21B3CA","analogous":["#CA215F","#CA8C21"],"triadic":["#21CA37","#3721CA"],"tetradic":["#5FCA21","#21B3CA","#8C21CA"],"splitComplementary":["#21CA8C","#215FCA"],"monochromatic":["#E57361","#CA3721","#7B2214"]}

Variants

{"light":"#E57361","dark":"#7B2214","saturated":"#E42407","desaturated":"#B04A3B","pastel":"#DF968B","neon":"#FF3414"}

Nearest named colors

[{"slug":"persian-red","name":"Persian Red","hex":"#CC3333","distance":18.547236990991408},{"slug":"rust","name":"Rust","hex":"#B7410E","distance":28.6705423736629},{"slug":"poppy-red","name":"Poppy Red","hex":"#DC343B","distance":31.76476034853718},{"slug":"firebrick","name":"Firebrick","hex":"#B22222","distance":31.906112267087632},{"slug":"vermilion","name":"Vermilion","hex":"#E34234","distance":33.27160951922825}]

HEX meaning and use

About #CA3721

#CA3721 is classified as a warm red value with vibrant visual character. #CA3721 is visually closest to Persian Red, a named red color with HEX #CC3333.

The RGB channels are 202, 55, and 33, with red carrying the strongest channel weight. In HSL, the hue is 8deg 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 0.154, white text provides the stronger contrast for readable interface or documentation use, and Its nearest named-color distance is 18.55, which helps separate this atlas value from adjacent named color records.

WCAG Accessibility

Black text4.08:1AA Fail

White text5.15:1AA Pass

AA text options: #FFFFFF, #F5F5F5.

AAA text options: none in seed set.

Accessibility-Safe Pairings and Alternatives

Use these pairings when #CA3721 needs readable text, badges, interface states, or nearby accessible alternatives.

Black text#0000004.08:1 · Fail

White text#FFFFFF5.15:1 · AA

Accessible Alternatives

#7B2214#FFFFFF text · best 10.09:1#7B2214

#21B3CA#000000 text · best 8.37:1#21B3CA

#CA8C21#000000 text · best 7.28:1#CA8C21

#E57361#000000 text · best 6.96:1#E57361

Firebrick#FFFFFF text · best 6.68:1#B22222

Generated Palette

#CA3721#CA3721

#21B3CA#21B3CA

#CA215F#CA215F

#CA8C21#CA8C21

#E57361#E57361

#7B2214#7B2214

Color Harmonies

#21B3CA#21B3CA

#CA215F#CA215F

#CA8C21#CA8C21

#21CA37#21CA37

#3721CA#3721CA

Variants

#E57361#E57361

#7B2214#7B2214

#E42407#E42407

#B04A3B#B04A3B

#DF968B#DF968B

#FF3414#FF3414

Nearest Named Colors

Persian Red#CC3333

Rust#B7410E

Poppy Red#DC343B

Firebrick#B22222

Vermilion#E34234

#CA3721

CSS

Machine-Readable HEX Data (JSON)

About #CA3721

WCAG Accessibility

Accessibility-Safe Pairings and Alternatives

Accessible Alternatives

Generated Palette

Color Harmonies

Variants

Nearest Named Colors

Related HEX Guides