Colors Encyclopedia

HEX atlas value

#CB2B0B

#CB2B0B is a warm red HEX color close to Mahogany. According to Colors Encyclopedia, it converts to RGB 203, 43, 11, HSL 10, 90%, 42%, has luminance 0.1445, and belongs to the vibrant group.

redwarmvibrant
#CB2B0B Sample readable text
HEX #CB2B0B
RGB rgb(203, 43, 11)
HSL hsl(10 90% 42%)
CMYK cmyk(0, 79, 95, 20)
Luminance 0.1445
Contrast Black 3.89:1White 5.4:1

CSS

--color-cb2b0b: #CB2B0B;
.background-cb2b0b { background-color: #CB2B0B; }
.text-cb2b0b { color: #CB2B0B; }

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
Luminance0.1445
Black text3.89:1AA Fail
White text5.4:1AA 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":"#CB2B0B","rgb":[203,43,11],"hsl":[10,90,42],"cmyk":[0,79,95,20],"luminance":0.1445,"contrast":{"black":3.89,"white":5.4}}
WCAG
{"AA":["#FFFFFF","#F5F5F5"],"AAA":[]}
Safe pairings
[{"name":"Black text","hex":"#000000","contrast":3.89,"wcagAA":false,"wcagAAA":false},{"name":"White text","hex":"#FFFFFF","contrast":5.4,"wcagAA":true,"wcagAAA":false}]
Accessible alternatives
[{"name":"#741806","hex":"#741806","family":"red","bestTextColor":"#FFFFFF","contrastBlack":1.88,"contrastWhite":11.19,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"#0BABCB","hex":"#0BABCB","family":"cyan","bestTextColor":"#000000","contrastBlack":7.7,"contrastWhite":2.73,"wcagAA":["#000000","#1A1A1A"],"wcagAAA":["#000000"]},{"name":"#CB8B0B","hex":"#CB8B0B","family":"orange","bestTextColor":"#000000","contrastBlack":7.24,"contrastWhite":2.9,"wcagAA":["#000000","#1A1A1A"],"wcagAAA":["#000000"]},{"name":"Firebrick","hex":"#B22222","family":"red","bestTextColor":"#FFFFFF","contrastBlack":3.14,"contrastWhite":6.68,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":[]},{"name":"#F55C3D","hex":"#F55C3D","family":"red","bestTextColor":"#000000","contrastBlack":6.48,"contrastWhite":3.24,"wcagAA":["#000000","#1A1A1A"],"wcagAAA":[]}]
AI context
{"semanticGroups":["warm red","vibrant","vibrant red","Mahogany 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/cb2b0b.json","https://www.colorsencyclopedia.com/api/hex.json","https://www.colorsencyclopedia.com/api/colors/mahogany.json","https://www.colorsencyclopedia.com/api/colors/rust.json","https://www.colorsencyclopedia.com/api/colors/firebrick.json"]}
Harmonies
{"complementary":"#0BABCB","analogous":["#CB0B4B","#CB8B0B"],"triadic":["#0BCB2B","#2B0BCB"],"tetradic":["#4BCB0B","#0BABCB","#8B0BCB"],"splitComplementary":["#0BCB8B","#0B4BCB"],"monochromatic":["#F55C3D","#CB2B0B","#741806"]}
Variants
{"light":"#F55C3D","dark":"#741806","saturated":"#D62400","desaturated":"#B43B22","pastel":"#EA816C","neon":"#FF2B00"}
Nearest named colors
[{"slug":"mahogany","name":"Mahogany","hex":"#C04000","distance":26.13426869074396},{"slug":"rust","name":"Rust","hex":"#B7410E","distance":29.88310559496787},{"slug":"firebrick","name":"Firebrick","hex":"#B22222","distance":35.14256678161116},{"slug":"venetian-red","name":"Venetian Red","hex":"#C80815","distance":36.52396473549935},{"slug":"traffic-red","name":"Traffic Red","hex":"#CC0605","distance":37.49666651850535}]
Dataset manifest Version 1.0.0 Build hash published in manifest Canonical page

HEX meaning and use

About #CB2B0B

#CB2B0B is classified as a warm red value with vibrant visual character. #CB2B0B is visually closest to Mahogany, a named orange color with HEX #C04000.

The RGB channels are 203, 43, and 11, with red carrying the strongest channel weight. In HSL, the hue is 10deg 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 0.1445, white text provides the stronger contrast for readable interface or documentation use, and Its nearest named-color distance is 26.13, which helps separate this atlas value from adjacent named color records.

WCAG Accessibility

Black text3.89:1AA Fail
White text5.4:1AA Pass

AA text options: #FFFFFF, #F5F5F5.

AAA text options: none in seed set.

Accessibility-Safe Pairings and Alternatives

Use these pairings when #CB2B0B needs readable text, badges, interface states, or nearby accessible alternatives.

Black text#0000003.89:1 · Fail
White text#FFFFFF5.4:1 · AA

Accessible Alternatives

#741806#FFFFFF text · best 11.19:1#741806
#0BABCB#000000 text · best 7.7:1#0BABCB
#CB8B0B#000000 text · best 7.24:1#CB8B0B
Firebrick#FFFFFF text · best 6.68:1#B22222
#F55C3D#000000 text · best 6.48:1#F55C3D

Generated Palette

#CB2B0B#CB2B0B
#0BABCB#0BABCB
#CB0B4B#CB0B4B
#CB8B0B#CB8B0B
#F55C3D#F55C3D
#741806#741806

Color Harmonies

#0BABCB#0BABCB
#CB0B4B#CB0B4B
#CB8B0B#CB8B0B
#0BCB2B#0BCB2B
#2B0BCB#2B0BCB

Variants

#F55C3D#F55C3D
#741806#741806
#D62400#D62400
#B43B22#B43B22
#EA816C#EA816C
#FF2B00#FF2B00

Nearest Named Colors

Mahogany#C04000
Rust#B7410E
Firebrick#B22222
Venetian Red#C80815
Traffic Red#CC0605

Related HEX Guides

Mahogany colorOpen the nearest named color reference for #C04000.Rust colorOpen the nearest named color reference for #B7410E.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.#CB2B0B APIOpen the machine-readable JSON record for this HEX value.