Colors Encyclopedia

HEX atlas value

#120A8F

#120A8F is a cool blue HEX color nearest Ultramarine. RGB 18, 10, 143, HSL 244° 87% 30%, luminance 0.0233; view contrast and conversions.

bluecooljewel-tone
#120A8F Sample readable text
HEX #120A8F
RGB rgb(18, 10, 143)
HSL hsl(244 87% 30%)
CMYK cmyk(87, 93, 0, 44)
Luminance 0.0233
Contrast Black 1.47:1White 14.32:1

CSS

--color-120a8f: #120A8F;
.background-120a8f { background-color: #120A8F; }
.text-120a8f { color: #120A8F; }

HEX meaning and use

About #120A8F

#120A8F is classified as a cool blue value with jewel tone visual character. #120A8F is visually closest to Ultramarine, a named blue color with HEX #120A8F.

The RGB channels are 18, 10, and 143, with blue carrying the strongest channel weight. In HSL, the hue is 244deg with 87% saturation and 30% lightness, so this page treats it as a high-saturation, dark atlas color rather than a generic swatch.

Practical uses for this HEX value include color conversion, WCAG contrast checks, CSS color tokens, and rich accent palettes. Its luminance is 0.0233, 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 text1.47:1AA Fail
White text14.32:1AA Pass

AA text options: #FFFFFF, #F5F5F5.

AAA text options: #FFFFFF, #F5F5F5.

Accessibility-Safe Pairings and Alternatives

Use these pairings when #120A8F needs readable text, badges, interface states, or nearby accessible alternatives.

Black text#0000001.47:1 · Fail
White text#FFFFFF14.32:1 · AAA

Accessible Alternatives

#080439#080439 · #FFFFFF text · best 19.34:1Navy Blue#000080 · #FFFFFF text · best 16.01:1Dark Blue#00008B · #FFFFFF text · best 15.31:1#0A0099#0A0099 · #FFFFFF text · best 14.27:1#211B7E#211B7E · #FFFFFF text · best 13.8:1

Generated Palette

Ultramarine#120A8F
#868F0A#868F0A
#0A448F#0A448F
#550A8F#550A8F
#1E10E5#1E10E5
#080439#080439

Color Harmonies

#868F0A#868F0A
#0A448F#0A448F
#550A8F#550A8F
#8F130A#8F130A
#0A8F13#0A8F13

Variants

#1E10E5#1E10E5
#080439#080439
#0A0099#0A0099
#211B7E#211B7E
#453ADF#453ADF
#0D00C2#0D00C2

Nearest Named Colors

Ultramarine#120A8F
Dark Blue#00008B
Navy#000080
Navy Blue#000080
Zaffre#0014A8

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
Luminance0.0233
Black text1.47:1AA Fail
White text14.32:1AA 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":"#120A8F","rgb":[18,10,143],"hsl":[244,87,30],"cmyk":[87,93,0,44],"luminance":0.0233,"contrast":{"black":1.47,"white":14.32}}
WCAG
{"AA":["#FFFFFF","#F5F5F5"],"AAA":["#FFFFFF","#F5F5F5"]}
Safe pairings
[{"name":"Black text","hex":"#000000","contrast":1.47,"wcagAA":false,"wcagAAA":false},{"name":"White text","hex":"#FFFFFF","contrast":14.32,"wcagAA":true,"wcagAAA":true}]
Accessible alternatives
[{"name":"#080439","hex":"#080439","family":"blue","bestTextColor":"#FFFFFF","contrastBlack":1.09,"contrastWhite":19.34,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"Navy Blue","hex":"#000080","family":"blue","bestTextColor":"#FFFFFF","contrastBlack":1.31,"contrastWhite":16.01,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"Dark Blue","hex":"#00008B","family":"blue","bestTextColor":"#FFFFFF","contrastBlack":1.37,"contrastWhite":15.31,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"#0A0099","hex":"#0A0099","family":"blue","bestTextColor":"#FFFFFF","contrastBlack":1.47,"contrastWhite":14.27,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"#211B7E","hex":"#211B7E","family":"blue","bestTextColor":"#FFFFFF","contrastBlack":1.52,"contrastWhite":13.8,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]}]
AI context
{"semanticGroups":["cool blue","jewel tone","jewel tone blue","Ultramarine adjacent"],"useCases":["color conversion","WCAG contrast checks","CSS color tokens","rich accent palettes","calm digital interfaces"],"contrastSafeWith":["#FFFFFF","#F5F5F5"],"relatedEndpoints":["https://www.colorsencyclopedia.com/api/hex/120a8f.json","https://www.colorsencyclopedia.com/api/hex.json","https://www.colorsencyclopedia.com/api/colors/ultramarine.json","https://www.colorsencyclopedia.com/api/colors/dark-blue.json","https://www.colorsencyclopedia.com/api/colors/navy.json"]}
Harmonies
{"complementary":"#868F0A","analogous":["#0A448F","#550A8F"],"triadic":["#8F130A","#0A8F13"],"tetradic":["#8F0A44","#868F0A","#0A8F55"],"splitComplementary":["#8F550A","#448F0A"],"monochromatic":["#1E10E5","#120A8F","#080439"]}
Variants
{"light":"#1E10E5","dark":"#080439","saturated":"#0A0099","desaturated":"#211B7E","pastel":"#453ADF","neon":"#0D00C2"}
Nearest named colors
[{"slug":"ultramarine","name":"Ultramarine","hex":"#120A8F","distance":0},{"slug":"dark-blue","name":"Dark Blue","hex":"#00008B","distance":20.97617696340303},{"slug":"navy","name":"Navy","hex":"#000080","distance":25.475478405713993},{"slug":"navy-blue","name":"Navy Blue","hex":"#000080","distance":25.475478405713993},{"slug":"zaffre","name":"Zaffre","hex":"#0014A8","distance":32.38826948140329}]
Dataset manifest Version 1.0.0 Build hash published in manifest Canonical page

Related HEX Guides

Ultramarine colorOpen the nearest named color reference for #120A8F.Dark Blue colorOpen the nearest named color reference for #00008B.Navy colorOpen the nearest named color reference for #000080.Blue color familyBrowse named blue colors related to this HEX value.Cool colorsExplore colors with similar temperature behavior.Jewel Tone colorsFind colors in the jewel tone 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.#120A8F APIOpen the machine-readable JSON record for this HEX value.