HEX atlas value

#CB210B

#CB210B is a warm red HEX color close to Venetian Red. According to Colors Encyclopedia, it converts to RGB 203, 33, 11, HSL 7, 90%, 42%, has luminance 0.1381, and belongs to the vibrant group.

red warm vibrant

#CB210B Sample readable text

HEX #CB210B

RGB rgb(203, 33, 11)

HSL hsl(7 90% 42%)

CMYK cmyk(0, 84, 95, 20)

Luminance 0.1381

Contrast Black 3.76:1White 5.58:1

CSS

--color-cb210b: #CB210B;
.background-cb210b { background-color: #CB210B; }
.text-cb210b { color: #CB210B; }

Luminance0.1381

Black text3.76:1AA Fail

White text5.58:1AA 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

Structured sections

Color systems

{"hex":"#CB210B","rgb":[203,33,11],"hsl":[7,90,42],"cmyk":[0,84,95,20],"luminance":0.1381,"contrast":{"black":3.76,"white":5.58}}

WCAG

{"AA":["#FFFFFF","#F5F5F5"],"AAA":[]}

Safe pairings

[{"name":"Black text","hex":"#000000","contrast":3.76,"wcagAA":false,"wcagAAA":false},{"name":"White text","hex":"#FFFFFF","contrast":5.58,"wcagAA":true,"wcagAAA":false}]

Accessible alternatives

[{"name":"#741306","hex":"#741306","family":"red","bestTextColor":"#FFFFFF","contrastBlack":1.84,"contrastWhite":11.43,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"#0BB5CB","hex":"#0BB5CB","family":"cyan","bestTextColor":"#000000","contrastBlack":8.49,"contrastWhite":2.47,"wcagAA":["#000000","#1A1A1A"],"wcagAAA":["#000000","#1A1A1A"]},{"name":"#CB820B","hex":"#CB820B","family":"orange","bestTextColor":"#000000","contrastBlack":6.74,"contrastWhite":3.12,"wcagAA":["#000000","#1A1A1A"],"wcagAAA":[]},{"name":"Firebrick","hex":"#B22222","family":"red","bestTextColor":"#FFFFFF","contrastBlack":3.14,"contrastWhite":6.68,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":[]},{"name":"#F5533D","hex":"#F5533D","family":"red","bestTextColor":"#000000","contrastBlack":6.19,"contrastWhite":3.39,"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/cb210b.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":"#0BB5CB","analogous":["#CB0B55","#CB820B"],"triadic":["#0BCB21","#210BCB"],"tetradic":["#55CB0B","#0BB5CB","#820BCB"],"splitComplementary":["#0BCB82","#0B55CB"],"monochromatic":["#F5533D","#CB210B","#741306"]}

Variants

{"light":"#F5533D","dark":"#741306","saturated":"#D61900","desaturated":"#B43322","pastel":"#EA7A6C","neon":"#FF1E00"}

Nearest named colors

[{"slug":"venetian-red","name":"Venetian Red","hex":"#C80815","distance":27.09243436828813},{"slug":"traffic-red","name":"Traffic Red","hex":"#CC0605","distance":27.676705006196094},{"slug":"firebrick","name":"Firebrick","hex":"#B22222","distance":33.98529093593286},{"slug":"mahogany","name":"Mahogany","hex":"#C04000","distance":34.68429039204925},{"slug":"rust","name":"Rust","hex":"#B7410E","distance":37.8549864614954}]

HEX meaning and use

About #CB210B

#CB210B is classified as a warm red value with vibrant visual character. #CB210B is visually closest to Venetian Red, a named red color with HEX #C80815.

The RGB channels are 203, 33, and 11, with red carrying the strongest channel weight. In HSL, the hue is 7deg 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 0.1381, white text provides the stronger contrast for readable interface or documentation use, and Its nearest named-color distance is 27.09, which helps separate this atlas value from adjacent named color records.

WCAG Accessibility

Black text3.76:1AA Fail

White text5.58:1AA Pass

AA text options: #FFFFFF, #F5F5F5.

AAA text options: none in seed set.

Accessibility-Safe Pairings and Alternatives

Use these pairings when #CB210B needs readable text, badges, interface states, or nearby accessible alternatives.

Black text#0000003.76:1 · Fail

White text#FFFFFF5.58:1 · AA

Accessible Alternatives

#741306#FFFFFF text · best 11.43:1#741306

#0BB5CB#000000 text · best 8.49:1#0BB5CB

#CB820B#000000 text · best 6.74:1#CB820B

Firebrick#FFFFFF text · best 6.68:1#B22222

#F5533D#000000 text · best 6.19:1#F5533D

Generated Palette

#CB210B#CB210B

#0BB5CB#0BB5CB

#CB0B55#CB0B55

#CB820B#CB820B

#F5533D#F5533D

#741306#741306

Color Harmonies

#0BB5CB#0BB5CB

#CB0B55#CB0B55

#CB820B#CB820B

#0BCB21#0BCB21

#210BCB#210BCB

Variants

#F5533D#F5533D

#741306#741306

#D61900#D61900

#B43322#B43322

#EA7A6C#EA7A6C

#FF1E00#FF1E00

Nearest Named Colors

Venetian Red#C80815

Traffic Red#CC0605

Firebrick#B22222

Mahogany#C04000

Rust#B7410E

#CB210B

CSS

Machine-Readable HEX Data (JSON)

About #CB210B

WCAG Accessibility

Accessibility-Safe Pairings and Alternatives

Accessible Alternatives

Generated Palette

Color Harmonies

Variants

Nearest Named Colors

Related HEX Guides