Colors Encyclopedia

HEX atlas value

#E3301C

#E3301C is a warm red HEX color close to Vermilion. According to Colors Encyclopedia, it converts to RGB 227, 48, 28, HSL 6, 78%, 50%, has luminance 0.1853, and belongs to the vibrant group.

redwarmvibrant
#E3301C Sample readable text
HEX #E3301C
RGB rgb(227, 48, 28)
HSL hsl(6 78% 50%)
CMYK cmyk(0, 79, 88, 11)
Luminance 0.1853
Contrast Black 4.71:1White 4.46:1

CSS

--color-e3301c: #E3301C;
.background-e3301c { background-color: #E3301C; }
.text-e3301c { color: #E3301C; }

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
Luminance0.1853
Black text4.71:1AA Pass
White text4.46:1AA 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
Download JSON Open API
Structured sections
Color systems
{"hex":"#E3301C","rgb":[227,48,28],"hsl":[6,78,50],"cmyk":[0,79,88,11],"luminance":0.1853,"contrast":{"black":4.71,"white":4.46}}
WCAG
{"AA":["#000000"],"AAA":[]}
Safe pairings
[{"name":"Black text","hex":"#000000","contrast":4.71,"wcagAA":true,"wcagAAA":false},{"name":"White text","hex":"#FFFFFF","contrast":4.46,"wcagAA":false,"wcagAAA":false}]
Accessible alternatives
[{"name":"#1CCFE3","hex":"#1CCFE3","family":"cyan","bestTextColor":"#000000","contrastBlack":11.08,"contrastWhite":1.89,"wcagAA":["#000000","#1A1A1A","#36454F"],"wcagAAA":["#000000","#1A1A1A"]},{"name":"#911F12","hex":"#911F12","family":"red","bestTextColor":"#FFFFFF","contrastBlack":2.41,"contrastWhite":8.72,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"#E3931C","hex":"#E3931C","family":"orange","bestTextColor":"#000000","contrastBlack":8.46,"contrastWhite":2.48,"wcagAA":["#000000","#1A1A1A"],"wcagAAA":["#000000","#1A1A1A"]},{"name":"#ED7A6E","hex":"#ED7A6E","family":"red","bestTextColor":"#000000","contrastBlack":7.61,"contrastWhite":2.76,"wcagAA":["#000000","#1A1A1A"],"wcagAAA":["#000000"]},{"name":"Scarlet","hex":"#FF2400","family":"red","bestTextColor":"#000000","contrastBlack":5.5,"contrastWhite":3.82,"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/e3301c.json","https://www.colorsencyclopedia.com/api/hex.json","https://www.colorsencyclopedia.com/api/colors/vermilion.json","https://www.colorsencyclopedia.com/api/colors/poppy-red.json","https://www.colorsencyclopedia.com/api/colors/persian-red.json"]}
Harmonies
{"complementary":"#1CCFE3","analogous":["#E31C6C","#E3931C"],"triadic":["#1CE330","#301CE3"],"tetradic":["#6CE31C","#1CCFE3","#931CE3"],"splitComplementary":["#1CE393","#1C6CE3"],"monochromatic":["#ED7A6E","#E3301C","#911F12"]}
Variants
{"light":"#ED7A6E","dark":"#911F12","saturated":"#FF1A00","desaturated":"#C74638","pastel":"#E79F97","neon":"#FF3E29"}
Nearest named colors
[{"slug":"vermilion","name":"Vermilion","hex":"#E34234","distance":30},{"slug":"poppy-red","name":"Poppy Red","hex":"#DC343B","distance":32.03123475609393},{"slug":"persian-red","name":"Persian Red","hex":"#CC3333","distance":32.66496594212215},{"slug":"cinnabar","name":"Cinnabar","hex":"#E44D2E","distance":34.14674215792775},{"slug":"scarlet","name":"Scarlet","hex":"#FF2400","distance":41.376321731154405}]
Dataset manifest Version 1.0.0 Build hash published in manifest Canonical page

HEX meaning and use

About #E3301C

#E3301C is classified as a warm red value with vibrant visual character. #E3301C is visually closest to Vermilion, a named red color with HEX #E34234.

The RGB channels are 227, 48, and 28, with red carrying the strongest channel weight. In HSL, the hue is 6deg with 78% saturation and 50% 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 0.1853, black text provides the stronger contrast for readable interface or documentation use, and Its nearest named-color distance is 30.00, which helps separate this atlas value from adjacent named color records.

WCAG Accessibility

Black text4.71:1AA Pass
White text4.46:1AA Fail

AA text options: #000000.

AAA text options: none in seed set.

Accessibility-Safe Pairings and Alternatives

Use these pairings when #E3301C needs readable text, badges, interface states, or nearby accessible alternatives.

Black text#0000004.71:1 · AA
White text#FFFFFF4.46:1 · Fail

Accessible Alternatives

#1CCFE3#000000 text · best 11.08:1#1CCFE3
#911F12#FFFFFF text · best 8.72:1#911F12
#E3931C#000000 text · best 8.46:1#E3931C
#ED7A6E#000000 text · best 7.61:1#ED7A6E
Scarlet#000000 text · best 5.5:1#FF2400

Generated Palette

#E3301C#E3301C
#1CCFE3#1CCFE3
#E31C6C#E31C6C
#E3931C#E3931C
#ED7A6E#ED7A6E
#911F12#911F12

Color Harmonies

#1CCFE3#1CCFE3
#E31C6C#E31C6C
#E3931C#E3931C
#1CE330#1CE330
#301CE3#301CE3

Variants

#ED7A6E#ED7A6E
#911F12#911F12
#FF1A00#FF1A00
#C74638#C74638
#E79F97#E79F97
#FF3E29#FF3E29

Nearest Named Colors

Vermilion#E34234
Poppy Red#DC343B
Persian Red#CC3333
Cinnabar#E44D2E
Scarlet#FF2400

Related HEX Guides

Vermilion colorOpen the nearest named color reference for #E34234.Poppy Red colorOpen the nearest named color reference for #DC343B.Persian Red colorOpen the nearest named color reference for #CC3333.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.#E3301C APIOpen the machine-readable JSON record for this HEX value.