HEX atlas value

#A12C21

#A12C21 is a warm red HEX color close to Brown. According to Colors Encyclopedia, it converts to RGB 161, 44, 33, HSL 5, 66%, 38%, has luminance 0.0949, and belongs to the balanced group.

red warm balanced

#A12C21 Sample readable text

HEX #A12C21

RGB rgb(161, 44, 33)

HSL hsl(5 66% 38%)

CMYK cmyk(0, 73, 80, 37)

Luminance 0.0949

Contrast Black 2.9:1White 7.25:1

CSS

--color-a12c21: #A12C21;
.background-a12c21 { background-color: #A12C21; }
.text-a12c21 { color: #A12C21; }

Luminance0.0949

Black text2.9:1AA Fail

White text7.25:1AA 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":"#A12C21","rgb":[161,44,33],"hsl":[5,66,38],"cmyk":[0,73,80,37],"luminance":0.0949,"contrast":{"black":2.9,"white":7.25}}

WCAG

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

Safe pairings

[{"name":"Black text","hex":"#000000","contrast":2.9,"wcagAA":false,"wcagAAA":false},{"name":"White text","hex":"#FFFFFF","contrast":7.25,"wcagAA":true,"wcagAAA":true}]

Accessible alternatives

[{"name":"#551711","hex":"#551711","family":"red","bestTextColor":"#FFFFFF","contrastBlack":1.52,"contrastWhite":13.85,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"Ruby Red","hex":"#9B111E","family":"red","bestTextColor":"#FFFFFF","contrastBlack":2.49,"contrastWhite":8.43,"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":"#8C3D36","hex":"#8C3D36","family":"red","bestTextColor":"#FFFFFF","contrastBlack":2.84,"contrastWhite":7.4,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF"]},{"name":"#A12156","hex":"#A12156","family":"pink","bestTextColor":"#FFFFFF","contrastBlack":2.87,"contrastWhite":7.32,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF"]}]

AI context

{"semanticGroups":["warm red","balanced","balanced red","Brown adjacent"],"useCases":["color conversion","WCAG contrast checks","CSS color tokens","high-attention visual states"],"contrastSafeWith":["#FFFFFF","#F5F5F5"],"relatedEndpoints":["https://www.colorsencyclopedia.com/api/hex/a12c21.json","https://www.colorsencyclopedia.com/api/hex.json","https://www.colorsencyclopedia.com/api/colors/brown.json","https://www.colorsencyclopedia.com/api/colors/firebrick.json","https://www.colorsencyclopedia.com/api/colors/brick-red.json"]}

Harmonies

{"complementary":"#2196A1","analogous":["#A12156","#A16C21"],"triadic":["#21A12C","#2C21A1"],"tetradic":["#56A121","#2196A1","#6C21A1"],"splitComplementary":["#21A16C","#2156A1"],"monochromatic":["#D95145","#A12C21","#551711"]}

Variants

{"light":"#D95145","dark":"#551711","saturated":"#B61A0C","desaturated":"#8C3D36","pastel":"#D17971","neon":"#EB1400"}

Nearest named colors

[{"slug":"brown","name":"Brown","hex":"#A52A2A","distance":10.04987562112089},{"slug":"firebrick","name":"Firebrick","hex":"#B22222","distance":19.748417658131498},{"slug":"brick-red","name":"Brick Red","hex":"#8A3324","distance":24.228082879171435},{"slug":"burnt-umber","name":"Burnt Umber","hex":"#8A3324","distance":24.228082879171435},{"slug":"ruby-red","name":"Ruby Red","hex":"#9B111E","distance":27.820855486487112}]

HEX meaning and use

About #A12C21

#A12C21 is classified as a warm red value with balanced visual character. #A12C21 is visually closest to Brown, a named red color with HEX #A52A2A.

The RGB channels are 161, 44, and 33, with red carrying the strongest channel weight. In HSL, the hue is 5deg with 66% saturation and 38% lightness, so this page treats it as a moderate-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-attention visual states. Its luminance is 0.0949, white text provides the stronger contrast for readable interface or documentation use, and Its nearest named-color distance is 10.05, which helps separate this atlas value from adjacent named color records.

WCAG Accessibility

Black text2.9:1AA Fail

White text7.25:1AA Pass

AA text options: #FFFFFF, #F5F5F5.

AAA text options: #FFFFFF.

Accessibility-Safe Pairings and Alternatives

Use these pairings when #A12C21 needs readable text, badges, interface states, or nearby accessible alternatives.

Black text#0000002.9:1 · Fail

White text#FFFFFF7.25:1 · AAA

Accessible Alternatives

#551711#FFFFFF text · best 13.85:1#551711

Ruby Red#FFFFFF text · best 8.43:1#9B111E

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

#8C3D36#FFFFFF text · best 7.4:1#8C3D36

#A12156#FFFFFF text · best 7.32:1#A12156

Generated Palette

#A12C21#A12C21

#2196A1#2196A1

#A12156#A12156

#A16C21#A16C21

#D95145#D95145

#551711#551711

Color Harmonies

#2196A1#2196A1

#A12156#A12156

#A16C21#A16C21

#21A12C#21A12C

#2C21A1#2C21A1

Variants

#D95145#D95145

#551711#551711

#B61A0C#B61A0C

#8C3D36#8C3D36

#D17971#D17971

#EB1400#EB1400

Nearest Named Colors

Brown#A52A2A

Firebrick#B22222

Brick Red#8A3324

Burnt Umber#8A3324

Ruby Red#9B111E

#A12C21

CSS

Machine-Readable HEX Data (JSON)

About #A12C21

WCAG Accessibility

Accessibility-Safe Pairings and Alternatives

Accessible Alternatives

Generated Palette

Color Harmonies

Variants

Nearest Named Colors

Related HEX Guides