Colors Encyclopedia

HEX atlas value

#CB1E0B

#CB1E0B is a warm red HEX color close to Venetian Red. According to Colors Encyclopedia, it converts to RGB 203, 30, 11, HSL 6, 90%, 42%, has luminance 0.1365, and belongs to the vibrant group.

redwarmvibrant
#CB1E0B Sample readable text
HEX #CB1E0B
RGB rgb(203, 30, 11)
HSL hsl(6 90% 42%)
CMYK cmyk(0, 85, 95, 20)
Luminance 0.1365
Contrast Black 3.73:1White 5.63:1

CSS

--color-cb1e0b: #CB1E0B;
.background-cb1e0b { background-color: #CB1E0B; }
.text-cb1e0b { color: #CB1E0B; }

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
Luminance0.1365
Black text3.73:1AA Fail
White text5.63:1AA 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
Download JSON Open API
Structured sections
Color systems
{"hex":"#CB1E0B","rgb":[203,30,11],"hsl":[6,90,42],"cmyk":[0,85,95,20],"luminance":0.1365,"contrast":{"black":3.73,"white":5.63}}
WCAG
{"AA":["#FFFFFF","#F5F5F5"],"AAA":[]}
Safe pairings
[{"name":"Black text","hex":"#000000","contrast":3.73,"wcagAA":false,"wcagAAA":false},{"name":"White text","hex":"#FFFFFF","contrast":5.63,"wcagAA":true,"wcagAAA":false}]
Accessible alternatives
[{"name":"#741106","hex":"#741106","family":"red","bestTextColor":"#FFFFFF","contrastBlack":1.83,"contrastWhite":11.5,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"#0BB8CB","hex":"#0BB8CB","family":"cyan","bestTextColor":"#000000","contrastBlack":8.73,"contrastWhite":2.4,"wcagAA":["#000000","#1A1A1A"],"wcagAAA":["#000000","#1A1A1A"]},{"name":"Tool Red","hex":"#B11226","family":"red","bestTextColor":"#FFFFFF","contrastBlack":2.98,"contrastWhite":7.04,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF"]},{"name":"Firebrick","hex":"#B22222","family":"red","bestTextColor":"#FFFFFF","contrastBlack":3.14,"contrastWhite":6.68,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":[]},{"name":"#CB7E0B","hex":"#CB7E0B","family":"orange","bestTextColor":"#000000","contrastBlack":6.53,"contrastWhite":3.22,"wcagAA":["#000000","#1A1A1A"],"wcagAAA":[]}]
AI context
{"semanticGroups":["warm red","vibrant","vibrant red","Venetian 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/cb1e0b.json","https://www.colorsencyclopedia.com/api/hex.json","https://www.colorsencyclopedia.com/api/colors/venetian-red.json","https://www.colorsencyclopedia.com/api/colors/traffic-red.json","https://www.colorsencyclopedia.com/api/colors/firebrick.json"]}
Harmonies
{"complementary":"#0BB8CB","analogous":["#CB0B58","#CB7E0B"],"triadic":["#0BCB1E","#1E0BCB"],"tetradic":["#58CB0B","#0BB8CB","#7E0BCB"],"splitComplementary":["#0BCB7E","#0B58CB"],"monochromatic":["#F5503D","#CB1E0B","#741106"]}
Variants
{"light":"#F5503D","dark":"#741106","saturated":"#D61500","desaturated":"#B43122","pastel":"#EA786C","neon":"#FF1A00"}
Nearest named colors
[{"slug":"venetian-red","name":"Venetian Red","hex":"#C80815","distance":24.351591323771842},{"slug":"traffic-red","name":"Traffic Red","hex":"#CC0605","distance":24.758836806279895},{"slug":"firebrick","name":"Firebrick","hex":"#B22222","distance":34.20526275297414},{"slug":"mahogany","name":"Mahogany","hex":"#C04000","distance":37.389838191679836},{"slug":"tool-red","name":"Tool Red","hex":"#B11226","distance":39.35733730830886}]
Dataset manifest Version 1.0.0 Build hash published in manifest Canonical page

HEX meaning and use

About #CB1E0B

#CB1E0B is classified as a warm red value with vibrant visual character. #CB1E0B is visually closest to Venetian Red, a named red color with HEX #C80815.

The RGB channels are 203, 30, and 11, with red carrying the strongest channel weight. In HSL, the hue is 6deg with 90% saturation and 42% 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 0.1365, white text provides the stronger contrast for readable interface or documentation use, and Its nearest named-color distance is 24.35, which helps separate this atlas value from adjacent named color records.

WCAG Accessibility

Black text3.73:1AA Fail
White text5.63:1AA Pass

AA text options: #FFFFFF, #F5F5F5.

AAA text options: none in seed set.

Accessibility-Safe Pairings and Alternatives

Use these pairings when #CB1E0B needs readable text, badges, interface states, or nearby accessible alternatives.

Black text#0000003.73:1 · Fail
White text#FFFFFF5.63:1 · AA

Accessible Alternatives

#741106#FFFFFF text · best 11.5:1#741106
#0BB8CB#000000 text · best 8.73:1#0BB8CB
Tool Red#FFFFFF text · best 7.04:1#B11226
Firebrick#FFFFFF text · best 6.68:1#B22222
#CB7E0B#000000 text · best 6.53:1#CB7E0B

Generated Palette

#CB1E0B#CB1E0B
#0BB8CB#0BB8CB
#CB0B58#CB0B58
#CB7E0B#CB7E0B
#F5503D#F5503D
#741106#741106

Color Harmonies

#0BB8CB#0BB8CB
#CB0B58#CB0B58
#CB7E0B#CB7E0B
#0BCB1E#0BCB1E
#1E0BCB#1E0BCB

Variants

#F5503D#F5503D
#741106#741106
#D61500#D61500
#B43122#B43122
#EA786C#EA786C
#FF1A00#FF1A00

Nearest Named Colors

Venetian Red#C80815
Traffic Red#CC0605
Firebrick#B22222
Mahogany#C04000
Tool Red#B11226

Related HEX Guides

Venetian Red colorOpen the nearest named color reference for #C80815.Traffic Red colorOpen the nearest named color reference for #CC0605.Firebrick colorOpen the nearest named color reference for #B22222.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.#CB1E0B APIOpen the machine-readable JSON record for this HEX value.