HEX atlas value

#A7451B

#A7451B is a warm orange HEX color close to Rust. According to Colors Encyclopedia, it converts to RGB 167, 69, 27, HSL 18, 72%, 38%, has luminance 0.1255, and belongs to the vibrant group.

orange warm vibrant

#A7451B Sample readable text

HEX #A7451B

RGB rgb(167, 69, 27)

HSL hsl(18 72% 38%)

CMYK cmyk(0, 59, 84, 35)

Luminance 0.1255

Contrast Black 3.51:1White 5.98:1

CSS

--color-a7451b: #A7451B;
.background-a7451b { background-color: #A7451B; }
.text-a7451b { color: #A7451B; }

Luminance0.1255

Black text3.51:1AA Fail

White text5.98:1AA 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":"#A7451B","rgb":[167,69,27],"hsl":[18,72,38],"cmyk":[0,59,84,35],"luminance":0.1255,"contrast":{"black":3.51,"white":5.98}}

WCAG

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

Safe pairings

[{"name":"Black text","hex":"#000000","contrast":3.51,"wcagAA":false,"wcagAAA":false},{"name":"White text","hex":"#FFFFFF","contrast":5.98,"wcagAA":true,"wcagAAA":false}]

Accessible alternatives

[{"name":"#58240E","hex":"#58240E","family":"orange","bestTextColor":"#FFFFFF","contrastBlack":1.67,"contrastWhite":12.54,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"Burnt Umber","hex":"#8A3324","family":"red","bestTextColor":"#FFFFFF","contrastBlack":2.58,"contrastWhite":8.14,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"#A71B37","hex":"#A71B37","family":"red","bestTextColor":"#FFFFFF","contrastBlack":2.86,"contrastWhite":7.35,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF"]},{"name":"Saddle Brown","hex":"#8B4513","family":"orange","bestTextColor":"#FFFFFF","contrastBlack":2.96,"contrastWhite":7.1,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF"]},{"name":"Brown","hex":"#A52A2A","family":"red","bestTextColor":"#FFFFFF","contrastBlack":2.96,"contrastWhite":7.09,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF"]}]

AI context

{"semanticGroups":["warm orange","vibrant","vibrant orange","Rust adjacent"],"useCases":["color conversion","WCAG contrast checks","CSS color tokens","high-energy accents"],"contrastSafeWith":["#FFFFFF","#F5F5F5"],"relatedEndpoints":["https://www.colorsencyclopedia.com/api/hex/a7451b.json","https://www.colorsencyclopedia.com/api/hex.json","https://www.colorsencyclopedia.com/api/colors/rust.json","https://www.colorsencyclopedia.com/api/colors/sienna.json","https://www.colorsencyclopedia.com/api/colors/saddle-brown.json"]}

Harmonies

{"complementary":"#1B7DA7","analogous":["#A71B37","#A78B1B"],"triadic":["#1BA745","#451BA7"],"tetradic":["#37A71B","#1B7DA7","#8B1BA7"],"splitComplementary":["#1BA78B","#1B37A7"],"monochromatic":["#E06E3E","#A7451B","#58240E"]}

Variants

{"light":"#E06E3E","dark":"#58240E","saturated":"#BC3C06","desaturated":"#914E30","pastel":"#D68B6B","neon":"#EB4600"}

Nearest named colors

[{"slug":"rust","name":"Rust","hex":"#B7410E","distance":21},{"slug":"sienna","name":"Sienna","hex":"#A0522D","distance":23.280893453645632},{"slug":"saddle-brown","name":"Saddle Brown","hex":"#8B4513","distance":29.120439557122072},{"slug":"brown","name":"Brown","hex":"#A52A2A","distance":30.95157508108432},{"slug":"brick-red","name":"Brick Red","hex":"#8A3324","distance":35.298725189445584}]

HEX meaning and use

About #A7451B

#A7451B is classified as a warm orange value with vibrant visual character. #A7451B is visually closest to Rust, a named orange color with HEX #B7410E.

The RGB channels are 167, 69, and 27, with red carrying the strongest channel weight. In HSL, the hue is 18deg 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 0.1255, white text provides the stronger contrast for readable interface or documentation use, and Its nearest named-color distance is 21.00, which helps separate this atlas value from adjacent named color records.

WCAG Accessibility

Black text3.51:1AA Fail

White text5.98:1AA Pass

AA text options: #FFFFFF, #F5F5F5.

AAA text options: none in seed set.

Accessibility-Safe Pairings and Alternatives

Use these pairings when #A7451B needs readable text, badges, interface states, or nearby accessible alternatives.

Black text#0000003.51:1 · Fail

White text#FFFFFF5.98:1 · AA

Accessible Alternatives

#58240E#FFFFFF text · best 12.54:1#58240E

Burnt Umber#FFFFFF text · best 8.14:1#8A3324

#A71B37#FFFFFF text · best 7.35:1#A71B37

Saddle Brown#FFFFFF text · best 7.1:1#8B4513

Brown#FFFFFF text · best 7.09:1#A52A2A

Generated Palette

#A7451B#A7451B

#1B7DA7#1B7DA7

#A71B37#A71B37

#A78B1B#A78B1B

#E06E3E#E06E3E

#58240E#58240E

Color Harmonies

#1B7DA7#1B7DA7

#A71B37#A71B37

#A78B1B#A78B1B

#1BA745#1BA745

#451BA7#451BA7

Variants

#E06E3E#E06E3E

#58240E#58240E

#BC3C06#BC3C06

#914E30#914E30

#D68B6B#D68B6B

#EB4600#EB4600

Nearest Named Colors

Rust#B7410E

Sienna#A0522D

Saddle Brown#8B4513

Brown#A52A2A

Brick Red#8A3324

#A7451B

CSS

Machine-Readable HEX Data (JSON)

About #A7451B

WCAG Accessibility

Accessibility-Safe Pairings and Alternatives

Accessible Alternatives

Generated Palette

Color Harmonies

Variants

Nearest Named Colors

Related HEX Guides