Colors Encyclopedia

HEX atlas value

#A7511B

#A7511B is a warm orange HEX color close to Sienna. According to Colors Encyclopedia, it converts to RGB 167, 81, 27, HSL 23, 72%, 38%, has luminance 0.1418, and belongs to the vibrant group.

orangewarmvibrant
#A7511B Sample readable text
HEX #A7511B
RGB rgb(167, 81, 27)
HSL hsl(23 72% 38%)
CMYK cmyk(0, 51, 84, 35)
Luminance 0.1418
Contrast Black 3.84:1White 5.47:1

CSS

--color-a7511b: #A7511B;
.background-a7511b { background-color: #A7511B; }
.text-a7511b { color: #A7511B; }

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
Luminance0.1418
Black text3.84:1AA Fail
White text5.47:1AA 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":"#A7511B","rgb":[167,81,27],"hsl":[23,72,38],"cmyk":[0,51,84,35],"luminance":0.1418,"contrast":{"black":3.84,"white":5.47}}
WCAG
{"AA":["#FFFFFF","#F5F5F5"],"AAA":[]}
Safe pairings
[{"name":"Black text","hex":"#000000","contrast":3.84,"wcagAA":false,"wcagAAA":false},{"name":"White text","hex":"#FFFFFF","contrast":5.47,"wcagAA":true,"wcagAAA":false}]
Accessible alternatives
[{"name":"#582A0E","hex":"#582A0E","family":"orange","bestTextColor":"#FFFFFF","contrastBlack":1.75,"contrastWhite":11.99,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"#A71B2B","hex":"#A71B2B","family":"red","bestTextColor":"#FFFFFF","contrastBlack":2.83,"contrastWhite":7.41,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF"]},{"name":"#E07C3E","hex":"#E07C3E","family":"orange","bestTextColor":"#000000","contrastBlack":7.12,"contrastWhite":2.95,"wcagAA":["#000000","#1A1A1A"],"wcagAAA":["#000000"]},{"name":"Saddle Brown","hex":"#8B4513","family":"orange","bestTextColor":"#FFFFFF","contrastBlack":2.96,"contrastWhite":7.1,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF"]},{"name":"#A7961B","hex":"#A7961B","family":"yellow","bestTextColor":"#000000","contrastBlack":7.02,"contrastWhite":2.99,"wcagAA":["#000000","#1A1A1A"],"wcagAAA":["#000000"]}]
AI context
{"semanticGroups":["warm orange","vibrant","vibrant orange","Sienna adjacent"],"useCases":["color conversion","WCAG contrast checks","CSS color tokens","high-energy accents"],"contrastSafeWith":["#FFFFFF","#F5F5F5"],"relatedEndpoints":["https://www.colorsencyclopedia.com/api/hex/a7511b.json","https://www.colorsencyclopedia.com/api/hex.json","https://www.colorsencyclopedia.com/api/colors/sienna.json","https://www.colorsencyclopedia.com/api/colors/rust.json","https://www.colorsencyclopedia.com/api/colors/saddle-brown.json"]}
Harmonies
{"complementary":"#1B71A7","analogous":["#A71B2B","#A7961B"],"triadic":["#1BA751","#511BA7"],"tetradic":["#2BA71B","#1B71A7","#961BA7"],"splitComplementary":["#1BA796","#1B2BA7"],"monochromatic":["#E07C3E","#A7511B","#582A0E"]}
Variants
{"light":"#E07C3E","dark":"#582A0E","saturated":"#BC4C06","desaturated":"#915630","pastel":"#D6946B","neon":"#EB5A00"}
Nearest named colors
[{"slug":"sienna","name":"Sienna","hex":"#A0522D","distance":19.339079605813716},{"slug":"rust","name":"Rust","hex":"#B7410E","distance":26.095976701399778},{"slug":"saddle-brown","name":"Saddle Brown","hex":"#8B4513","distance":31.496031496047245},{"slug":"cedar","name":"Cedar","hex":"#8B5A2B","distance":33.481338085566414},{"slug":"red-clay","name":"Red Clay","hex":"#B45A3C","distance":36.59234892706397}]
Dataset manifest Version 1.0.0 Build hash published in manifest Canonical page

HEX meaning and use

About #A7511B

#A7511B is classified as a warm orange value with vibrant visual character. #A7511B is visually closest to Sienna, a named orange color with HEX #A0522D.

The RGB channels are 167, 81, and 27, with red carrying the strongest channel weight. In HSL, the hue is 23deg with 72% saturation and 38% 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 0.1418, white text provides the stronger contrast for readable interface or documentation use, and Its nearest named-color distance is 19.34, which helps separate this atlas value from adjacent named color records.

WCAG Accessibility

Black text3.84:1AA Fail
White text5.47:1AA Pass

AA text options: #FFFFFF, #F5F5F5.

AAA text options: none in seed set.

Accessibility-Safe Pairings and Alternatives

Use these pairings when #A7511B needs readable text, badges, interface states, or nearby accessible alternatives.

Black text#0000003.84:1 · Fail
White text#FFFFFF5.47:1 · AA

Accessible Alternatives

#582A0E#FFFFFF text · best 11.99:1#582A0E
#A71B2B#FFFFFF text · best 7.41:1#A71B2B
#E07C3E#000000 text · best 7.12:1#E07C3E
Saddle Brown#FFFFFF text · best 7.1:1#8B4513
#A7961B#000000 text · best 7.02:1#A7961B

Generated Palette

#A7511B#A7511B
#1B71A7#1B71A7
#A71B2B#A71B2B
#A7961B#A7961B
#E07C3E#E07C3E
#582A0E#582A0E

Color Harmonies

#1B71A7#1B71A7
#A71B2B#A71B2B
#A7961B#A7961B
#1BA751#1BA751
#511BA7#511BA7

Variants

#E07C3E#E07C3E
#582A0E#582A0E
#BC4C06#BC4C06
#915630#915630
#D6946B#D6946B
#EB5A00#EB5A00

Nearest Named Colors

Sienna#A0522D
Rust#B7410E
Saddle Brown#8B4513
Cedar#8B5A2B
Red Clay#B45A3C

Related HEX Guides

Sienna colorOpen the nearest named color reference for #A0522D.Rust colorOpen the nearest named color reference for #B7410E.Saddle Brown colorOpen the nearest named color reference for #8B4513.Orange color familyBrowse named orange 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.#A7511B APIOpen the machine-readable JSON record for this HEX value.