Colors Encyclopedia

HEX atlas value

#FB3B2D

#FB3B2D is a warm red HEX color close to Vermilion. According to Colors Encyclopedia, it converts to RGB 251, 59, 45, HSL 4, 96%, 58%, has luminance 0.2383, and belongs to the vibrant group.

redwarmvibrant
#FB3B2D Sample readable text
HEX #FB3B2D
RGB rgb(251, 59, 45)
HSL hsl(4 96% 58%)
CMYK cmyk(0, 76, 82, 2)
Luminance 0.2383
Contrast Black 5.77:1White 3.64:1

CSS

--color-fb3b2d: #FB3B2D;
.background-fb3b2d { background-color: #FB3B2D; }
.text-fb3b2d { color: #FB3B2D; }

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
Luminance0.2383
Black text5.77:1AA Pass
White text3.64:1AA 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":"#FB3B2D","rgb":[251,59,45],"hsl":[4,96,58],"cmyk":[0,76,82,2],"luminance":0.2383,"contrast":{"black":5.77,"white":3.64}}
WCAG
{"AA":["#000000","#1A1A1A"],"AAA":[]}
Safe pairings
[{"name":"Black text","hex":"#000000","contrast":5.77,"wcagAA":true,"wcagAAA":false},{"name":"White text","hex":"#FFFFFF","contrast":3.64,"wcagAA":false,"wcagAAA":false}]
Accessible alternatives
[{"name":"#2DEDFB","hex":"#2DEDFB","family":"cyan","bestTextColor":"#000000","contrastBlack":14.62,"contrastWhite":1.44,"wcagAA":["#000000","#1A1A1A","#36454F"],"wcagAAA":["#000000","#1A1A1A"]},{"name":"#FBA22D","hex":"#FBA22D","family":"orange","bestTextColor":"#000000","contrastBlack":10.31,"contrastWhite":2.04,"wcagAA":["#000000","#1A1A1A","#36454F"],"wcagAAA":["#000000","#1A1A1A"]},{"name":"#FD8F87","hex":"#FD8F87","family":"red","bestTextColor":"#000000","contrastBlack":9.46,"contrastWhite":2.22,"wcagAA":["#000000","#1A1A1A"],"wcagAAA":["#000000","#1A1A1A"]},{"name":"Neon Orange","hex":"#FF5F1F","family":"orange","bestTextColor":"#000000","contrastBlack":6.91,"contrastWhite":3.04,"wcagAA":["#000000","#1A1A1A"],"wcagAAA":[]},{"name":"Tulip Red","hex":"#FF4D4D","family":"red","bestTextColor":"#000000","contrastBlack":6.42,"contrastWhite":3.27,"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","#1A1A1A"],"relatedEndpoints":["https://www.colorsencyclopedia.com/api/hex/fb3b2d.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":"#2DEDFB","analogous":["#FB2D86","#FBA22D"],"triadic":["#2DFB3B","#3B2DFB"],"tetradic":["#86FB2D","#2DEDFB","#A22DFB"],"splitComplementary":["#2DFBA2","#2D86FB"],"monochromatic":["#FD8F87","#FB3B2D","#C81104"]}
Variants
{"light":"#FD8F87","dark":"#C81104","saturated":"#FF3729","desaturated":"#E34F45","pastel":"#F7B5B1","neon":"#FF5D52"}
Nearest named colors
[{"slug":"vermilion","name":"Vermilion","hex":"#E34234","distance":25.96150997149434},{"slug":"cinnabar","name":"Cinnabar","hex":"#E44D2E","distance":29.223278392404914},{"slug":"poppy-red","name":"Poppy Red","hex":"#DC343B","distance":34.72751070837067},{"slug":"tulip-red","name":"Tulip Red","hex":"#FF4D4D","distance":36.932370625238775},{"slug":"neon-orange","name":"Neon Orange","hex":"#FF5F1F","distance":38.8329756778952}]
Dataset manifest Version 1.0.0 Build hash published in manifest Canonical page

HEX meaning and use

About #FB3B2D

#FB3B2D is classified as a warm red value with vibrant visual character. #FB3B2D is visually closest to Vermilion, a named red color with HEX #E34234.

The RGB channels are 251, 59, and 45, with red carrying the strongest channel weight. In HSL, the hue is 4deg with 96% saturation and 58% 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 0.2383, black text provides the stronger contrast for readable interface or documentation use, and Its nearest named-color distance is 25.96, which helps separate this atlas value from adjacent named color records.

WCAG Accessibility

Black text5.77:1AA Pass
White text3.64:1AA Fail

AA text options: #000000, #1A1A1A.

AAA text options: none in seed set.

Accessibility-Safe Pairings and Alternatives

Use these pairings when #FB3B2D needs readable text, badges, interface states, or nearby accessible alternatives.

Black text#0000005.77:1 · AA
White text#FFFFFF3.64:1 · Fail

Accessible Alternatives

#2DEDFB#000000 text · best 14.62:1#2DEDFB
#FBA22D#000000 text · best 10.31:1#FBA22D
#FD8F87#000000 text · best 9.46:1#FD8F87
Neon Orange#000000 text · best 6.91:1#FF5F1F
Tulip Red#000000 text · best 6.42:1#FF4D4D

Generated Palette

#FB3B2D#FB3B2D
#2DEDFB#2DEDFB
#FB2D86#FB2D86
#FBA22D#FBA22D
#FD8F87#FD8F87
#C81104#C81104

Color Harmonies

#2DEDFB#2DEDFB
#FB2D86#FB2D86
#FBA22D#FBA22D
#2DFB3B#2DFB3B
#3B2DFB#3B2DFB

Variants

#FD8F87#FD8F87
#C81104#C81104
#FF3729#FF3729
#E34F45#E34F45
#F7B5B1#F7B5B1
#FF5D52#FF5D52

Nearest Named Colors

Vermilion#E34234
Cinnabar#E44D2E
Poppy Red#DC343B
Tulip Red#FF4D4D
Neon Orange#FF5F1F

Related HEX Guides

Vermilion colorOpen the nearest named color reference for #E34234.Cinnabar colorOpen the nearest named color reference for #E44D2E.Poppy Red colorOpen the nearest named color reference for #DC343B.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.#FB3B2D APIOpen the machine-readable JSON record for this HEX value.