HEX atlas value

#E31C1C

#E31C1C is a warm red HEX color nearest Cadmium Red. RGB 227, 28, 28, HSL 0° 78% 50%, luminance 0.1725; view contrast and conversions.

red warm vibrant

#E31C1C Sample readable text

HEX #E31C1C

RGB rgb(227, 28, 28)

HSL hsl(0 78% 50%)

CMYK cmyk(0, 88, 88, 11)

Luminance 0.1725

Contrast Black 4.45:1White 4.72:1

CSS

--color-e31c1c: #E31C1C;
.background-e31c1c { background-color: #E31C1C; }
.text-e31c1c { color: #E31C1C; }

HEX meaning and use

About #E31C1C

#E31C1C is classified as a warm red value with vibrant visual character. #E31C1C is visually closest to Cadmium Red, a named red color with HEX #E30022.

The RGB channels are 227, 28, and 28, with red carrying the strongest channel weight. In HSL, the hue is 0deg with 78% saturation and 50% lightness, so this page treats it as a high-saturation, mid-lightness atlas color rather than a generic swatch.

Practical uses for this HEX value include color conversion, WCAG contrast checks, CSS color tokens, and high-energy accents. Its luminance is 0.1725, white text provides the stronger contrast for readable interface or documentation use, and Its nearest named-color distance is 28.64, which helps separate this atlas value from adjacent named color records.

WCAG Accessibility

Black text4.45:1AA Fail

White text4.72:1AA Pass

AA text options: #FFFFFF.

AAA text options: none in seed set.

Accessibility-Safe Pairings and Alternatives

Use these pairings when #E31C1C needs readable text, badges, interface states, or nearby accessible alternatives.

Black text#0000004.45:1 · Fail

White text#FFFFFF4.72:1 · AA

Accessible Alternatives

#1CE3E3#1CE3E3 · #000000 text · best 13.15:1 #911212#911212 · #FFFFFF text · best 9.13:1 #E37F1C#E37F1C · #000000 text · best 7.32:1 #ED6E6E#ED6E6E · #000000 text · best 7.06:1 Venetian Red#C80815 · #FFFFFF text · best 6:1

Generated Palette

#E31C1C#E31C1C

#1CE3E3#1CE3E3

#E31C80#E31C80

#E37F1C#E37F1C

#ED6E6E#ED6E6E

#911212#911212

Color Harmonies

#1CE3E3#1CE3E3

#E31C80#E31C80

#E37F1C#E37F1C

#1CE31C#1CE31C

#1C1CE3#1C1CE3

Variants

#ED6E6E#ED6E6E

#911212#911212

Red#FF0000

#C73838#C73838

#E79797#E79797

#FF2929#FF2929

Nearest Named Colors

Cadmium Red#E30022

Crimson#DC143C

Cherry Red#D2042D

Venetian Red#C80815

Traffic Red#CC0605

Luminance0.1725

Black text4.45:1AA Fail

White text4.72:1AA 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":"#E31C1C","rgb":[227,28,28],"hsl":[0,78,50],"cmyk":[0,88,88,11],"luminance":0.1725,"contrast":{"black":4.45,"white":4.72}}

WCAG

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

Safe pairings

[{"name":"Black text","hex":"#000000","contrast":4.45,"wcagAA":false,"wcagAAA":false},{"name":"White text","hex":"#FFFFFF","contrast":4.72,"wcagAA":true,"wcagAAA":false}]

Accessible alternatives

[{"name":"#1CE3E3","hex":"#1CE3E3","family":"cyan","bestTextColor":"#000000","contrastBlack":13.15,"contrastWhite":1.6,"wcagAA":["#000000","#1A1A1A","#36454F"],"wcagAAA":["#000000","#1A1A1A"]},{"name":"#911212","hex":"#911212","family":"red","bestTextColor":"#FFFFFF","contrastBlack":2.3,"contrastWhite":9.13,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"#E37F1C","hex":"#E37F1C","family":"orange","bestTextColor":"#000000","contrastBlack":7.32,"contrastWhite":2.87,"wcagAA":["#000000","#1A1A1A"],"wcagAAA":["#000000"]},{"name":"#ED6E6E","hex":"#ED6E6E","family":"red","bestTextColor":"#000000","contrastBlack":7.06,"contrastWhite":2.98,"wcagAA":["#000000","#1A1A1A"],"wcagAAA":["#000000"]},{"name":"Venetian Red","hex":"#C80815","family":"red","bestTextColor":"#FFFFFF","contrastBlack":3.5,"contrastWhite":6,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":[]}]

AI context

{"semanticGroups":["warm red","vibrant","vibrant red","Cadmium Red adjacent"],"useCases":["color conversion","WCAG contrast checks","CSS color tokens","high-energy accents","high-attention visual states"],"contrastSafeWith":["#FFFFFF"],"relatedEndpoints":["https://www.colorsencyclopedia.com/api/hex/e31c1c.json","https://www.colorsencyclopedia.com/api/hex.json","https://www.colorsencyclopedia.com/api/colors/cadmium-red.json","https://www.colorsencyclopedia.com/api/colors/crimson.json","https://www.colorsencyclopedia.com/api/colors/cherry-red.json"]}

Harmonies

{"complementary":"#1CE3E3","analogous":["#E31C80","#E37F1C"],"triadic":["#1CE31C","#1C1CE3"],"tetradic":["#80E31C","#1CE3E3","#7F1CE3"],"splitComplementary":["#1CE380","#1C7FE3"],"monochromatic":["#ED6E6E","#E31C1C","#911212"]}

Variants

{"light":"#ED6E6E","dark":"#911212","saturated":"#FF0000","desaturated":"#C73838","pastel":"#E79797","neon":"#FF2929"}

Nearest named colors

[{"slug":"cadmium-red","name":"Cadmium Red","hex":"#E30022","distance":28.635642126552707},{"slug":"crimson","name":"Crimson","hex":"#DC143C","distance":33.71943060017473},{"slug":"cherry-red","name":"Cherry Red","hex":"#D2042D","distance":33.97057550292606},{"slug":"venetian-red","name":"Venetian Red","hex":"#C80815","distance":34.322004603461025},{"slug":"traffic-red","name":"Traffic Red","hex":"#CC0605","distance":39.26830783214372}]

#E31C1C

CSS

About #E31C1C

WCAG Accessibility

Accessibility-Safe Pairings and Alternatives

Accessible Alternatives

Generated Palette

Color Harmonies

Variants

Nearest Named Colors

Machine-Readable HEX Data (JSON)

Related HEX Guides