HEX atlas value

#E33A1C

#E33A1C is a warm red HEX color nearest Vermilion. RGB 227, 58, 28, HSL 9° 78% 50%, luminance 0.1944; view contrast and conversions.

red warm vibrant

#E33A1C Sample readable text

HEX #E33A1C

RGB rgb(227, 58, 28)

HSL hsl(9 78% 50%)

CMYK cmyk(0, 74, 88, 11)

Luminance 0.1944

Contrast Black 4.89:1White 4.3:1

CSS

--color-e33a1c: #E33A1C;
.background-e33a1c { background-color: #E33A1C; }
.text-e33a1c { color: #E33A1C; }

HEX meaning and use

About #E33A1C

#E33A1C is classified as a warm red value with vibrant visual character. #E33A1C is visually closest to Vermilion, a named red color with HEX #E34234.

The RGB channels are 227, 58, and 28, with red carrying the strongest channel weight. In HSL, the hue is 9deg 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 0.1944, black text provides the stronger contrast for readable interface or documentation use, and Its nearest named-color distance is 25.30, which helps separate this atlas value from adjacent named color records.

WCAG Accessibility

Black text4.89:1AA Pass

White text4.3:1AA Fail

AA text options: #000000.

AAA text options: none in seed set.

Accessibility-Safe Pairings and Alternatives

Use these pairings when #E33A1C needs readable text, badges, interface states, or nearby accessible alternatives.

Black text#0000004.89:1 · AA

White text#FFFFFF4.3:1 · Fail

Accessible Alternatives

#1CC5E3#1CC5E3 · #000000 text · best 10.15:1 #E39D1C#E39D1C · #000000 text · best 9.11:1 #912512#912512 · #FFFFFF text · best 8.47:1 #ED816E#ED816E · #000000 text · best 7.97:1 Fire Opal#E95C20 · #000000 text · best 6.02:1

Generated Palette

#E33A1C#E33A1C

#1CC5E3#1CC5E3

#E31C62#E31C62

#E39D1C#E39D1C

#ED816E#ED816E

#912512#912512

Color Harmonies

#1CC5E3#1CC5E3

#E31C62#E31C62

#E39D1C#E39D1C

#1CE33A#1CE33A

#3A1CE3#3A1CE3

Variants

#ED816E#ED816E

#912512#912512

#FF2600#FF2600

#C74E38#C74E38

#E7A397#E7A397

#FF4929#FF4929

Nearest Named Colors

Vermilion#E34234

Cinnabar#E44D2E

Poppy Red#DC343B

Persian Red#CC3333

Fire Opal#E95C20

Luminance0.1944

Black text4.89:1AA Pass

White text4.3:1AA Fail

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":"#E33A1C","rgb":[227,58,28],"hsl":[9,78,50],"cmyk":[0,74,88,11],"luminance":0.1944,"contrast":{"black":4.89,"white":4.3}}

WCAG

{"AA":["#000000"],"AAA":[]}

Safe pairings

[{"name":"Black text","hex":"#000000","contrast":4.89,"wcagAA":true,"wcagAAA":false},{"name":"White text","hex":"#FFFFFF","contrast":4.3,"wcagAA":false,"wcagAAA":false}]

Accessible alternatives

[{"name":"#1CC5E3","hex":"#1CC5E3","family":"cyan","bestTextColor":"#000000","contrastBlack":10.15,"contrastWhite":2.07,"wcagAA":["#000000","#1A1A1A","#36454F"],"wcagAAA":["#000000","#1A1A1A"]},{"name":"#E39D1C","hex":"#E39D1C","family":"orange","bestTextColor":"#000000","contrastBlack":9.11,"contrastWhite":2.31,"wcagAA":["#000000","#1A1A1A"],"wcagAAA":["#000000","#1A1A1A"]},{"name":"#912512","hex":"#912512","family":"red","bestTextColor":"#FFFFFF","contrastBlack":2.48,"contrastWhite":8.47,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"#ED816E","hex":"#ED816E","family":"red","bestTextColor":"#000000","contrastBlack":7.97,"contrastWhite":2.64,"wcagAA":["#000000","#1A1A1A"],"wcagAAA":["#000000"]},{"name":"Fire Opal","hex":"#E95C20","family":"orange","bestTextColor":"#000000","contrastBlack":6.02,"contrastWhite":3.49,"wcagAA":["#000000","#1A1A1A"],"wcagAAA":[]}]

AI context

{"semanticGroups":["warm red","vibrant","vibrant red","Vermilion adjacent"],"useCases":["color conversion","WCAG contrast checks","CSS color tokens","high-energy accents","high-attention visual states"],"contrastSafeWith":["#000000"],"relatedEndpoints":["https://www.colorsencyclopedia.com/api/hex/e33a1c.json","https://www.colorsencyclopedia.com/api/hex.json","https://www.colorsencyclopedia.com/api/colors/vermilion.json","https://www.colorsencyclopedia.com/api/colors/cinnabar.json","https://www.colorsencyclopedia.com/api/colors/poppy-red.json"]}

Harmonies

{"complementary":"#1CC5E3","analogous":["#E31C62","#E39D1C"],"triadic":["#1CE33A","#3A1CE3"],"tetradic":["#62E31C","#1CC5E3","#9D1CE3"],"splitComplementary":["#1CE39D","#1C62E3"],"monochromatic":["#ED816E","#E33A1C","#912512"]}

Variants

{"light":"#ED816E","dark":"#912512","saturated":"#FF2600","desaturated":"#C74E38","pastel":"#E7A397","neon":"#FF4929"}

Nearest named colors

[{"slug":"vermilion","name":"Vermilion","hex":"#E34234","distance":25.298221281347036},{"slug":"cinnabar","name":"Cinnabar","hex":"#E44D2E","distance":26.19160170741759},{"slug":"poppy-red","name":"Poppy Red","hex":"#DC343B","distance":32.341923257592455},{"slug":"persian-red","name":"Persian Red","hex":"#CC3333","distance":33.27160951922825},{"slug":"fire-opal","name":"Fire Opal","hex":"#E95C20","distance":34.75629439396553}]

#E33A1C

CSS

About #E33A1C

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