Colors Encyclopedia

HEX atlas value

#990000

#990000 is a warm red HEX color close to Crimson Red. According to Colors Encyclopedia, it converts to RGB 153, 0, 0, HSL 0, 100%, 30%, has luminance 0.0677, and belongs to the balanced group.

redwarmbalanced
#990000 Sample readable text
HEX #990000
RGB rgb(153, 0, 0)
HSL hsl(0 100% 30%)
CMYK cmyk(0, 100, 100, 40)
Luminance 0.0677
Contrast Black 2.35:1White 8.92:1

CSS

--color-990000: #990000;
.background-990000 { background-color: #990000; }
.text-990000 { color: #990000; }

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
Luminance0.0677
Black text2.35:1AA Fail
White text8.92:1AA 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":"#990000","rgb":[153,0,0],"hsl":[0,100,30],"cmyk":[0,100,100,40],"luminance":0.0677,"contrast":{"black":2.35,"white":8.92}}
WCAG
{"AA":["#FFFFFF","#F5F5F5"],"AAA":["#FFFFFF","#F5F5F5"]}
Safe pairings
[{"name":"Black text","hex":"#000000","contrast":2.35,"wcagAA":false,"wcagAAA":false},{"name":"White text","hex":"#FFFFFF","contrast":8.92,"wcagAA":true,"wcagAAA":true}]
Accessible alternatives
[{"name":"#3D0000","hex":"#3D0000","family":"red","bestTextColor":"#FFFFFF","contrastBlack":1.2,"contrastWhite":17.53,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"Maroon","hex":"#800000","family":"red","bestTextColor":"#FFFFFF","contrastBlack":1.92,"contrastWhite":10.95,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"Dark Red","hex":"#8B0000","family":"red","bestTextColor":"#FFFFFF","contrastBlack":2.1,"contrastWhite":10.01,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"#881111","hex":"#881111","family":"red","bestTextColor":"#FFFFFF","contrastBlack":2.14,"contrastWhite":9.83,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"Carmine","hex":"#960018","family":"red","bestTextColor":"#FFFFFF","contrastBlack":2.31,"contrastWhite":9.09,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]}]
AI context
{"semanticGroups":["warm red","balanced","balanced red","Crimson Red adjacent"],"useCases":["color conversion","WCAG contrast checks","CSS color tokens","high-attention visual states"],"contrastSafeWith":["#FFFFFF","#F5F5F5"],"relatedEndpoints":["https://www.colorsencyclopedia.com/api/hex/990000.json","https://www.colorsencyclopedia.com/api/hex.json","https://www.colorsencyclopedia.com/api/colors/crimson-red.json","https://www.colorsencyclopedia.com/api/colors/dark-red.json","https://www.colorsencyclopedia.com/api/colors/cranberry.json"]}
Harmonies
{"complementary":"#009999","analogous":["#99004D","#994C00"],"triadic":["#009900","#000099"],"tetradic":["#4D9900","#009999","#4C0099"],"splitComplementary":["#00994D","#004C99"],"monochromatic":["#F50000","#990000","#3D0000"]}
Variants
{"light":"#F50000","dark":"#3D0000","saturated":"#990000","desaturated":"#881111","pastel":"#EE2B2B","neon":"#C20000"}
Nearest named colors
[{"slug":"crimson-red","name":"Crimson Red","hex":"#990000","distance":0},{"slug":"dark-red","name":"Dark Red","hex":"#8B0000","distance":14},{"slug":"cranberry","name":"Cranberry","hex":"#9F000F","distance":16.15549442140351},{"slug":"carmine","name":"Carmine","hex":"#960018","distance":24.186773244895647},{"slug":"maroon","name":"Maroon","hex":"#800000","distance":25}]
Dataset manifest Version 1.0.0 Build hash published in manifest Canonical page

HEX meaning and use

About #990000

#990000 is classified as a warm red value with balanced visual character. #990000 is visually closest to Crimson Red, a named red color with HEX #990000.

The RGB channels are 153, 0, and 0, with red carrying the strongest channel weight. In HSL, the hue is 0deg with 100% saturation and 30% lightness, so this page treats it as a high-saturation, dark 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-attention visual states. Its luminance is 0.0677, white text provides the stronger contrast for readable interface or documentation use, and Its nearest named-color distance is 0.00, which helps separate this atlas value from adjacent named color records.

WCAG Accessibility

Black text2.35:1AA Fail
White text8.92:1AA Pass

AA text options: #FFFFFF, #F5F5F5.

AAA text options: #FFFFFF, #F5F5F5.

Accessibility-Safe Pairings and Alternatives

Use these pairings when #990000 needs readable text, badges, interface states, or nearby accessible alternatives.

Black text#0000002.35:1 · Fail
White text#FFFFFF8.92:1 · AAA

Accessible Alternatives

#3D0000#FFFFFF text · best 17.53:1#3D0000
Maroon#FFFFFF text · best 10.95:1#800000
Dark Red#FFFFFF text · best 10.01:1#8B0000
#881111#FFFFFF text · best 9.83:1#881111
Carmine#FFFFFF text · best 9.09:1#960018

Generated Palette

Crimson Red#990000
#009999#009999
#99004D#99004D
#994C00#994C00
#F50000#F50000
#3D0000#3D0000

Color Harmonies

#009999#009999
#99004D#99004D
#994C00#994C00
#009900#009900
#000099#000099

Variants

#F50000#F50000
#3D0000#3D0000
Crimson Red#990000
#881111#881111
#EE2B2B#EE2B2B
#C20000#C20000

Nearest Named Colors

Crimson Red#990000
Dark Red#8B0000
Cranberry#9F000F
Carmine#960018
Maroon#800000

Related HEX Guides

Crimson Red colorOpen the nearest named color reference for #990000.Dark Red colorOpen the nearest named color reference for #8B0000.Cranberry colorOpen the nearest named color reference for #9F000F.Red color familyBrowse named red colors related to this HEX value.Warm colorsExplore colors with similar temperature behavior.Balanced colorsFind colors in the balanced 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.#990000 APIOpen the machine-readable JSON record for this HEX value.