Colors Encyclopedia

HEX atlas value

#AC2715

#AC2715 is a warm red HEX color close to Firebrick. According to Colors Encyclopedia, it converts to RGB 172, 39, 21, HSL 7, 78%, 38%, has luminance 0.1028, and belongs to the vibrant group.

redwarmvibrant
#AC2715 Sample readable text
HEX #AC2715
RGB rgb(172, 39, 21)
HSL hsl(7 78% 38%)
CMYK cmyk(0, 77, 88, 33)
Luminance 0.1028
Contrast Black 3.06:1White 6.87:1

CSS

--color-ac2715: #AC2715;
.background-ac2715 { background-color: #AC2715; }
.text-ac2715 { color: #AC2715; }

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
Luminance0.1028
Black text3.06:1AA Fail
White text6.87:1AA 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":"#AC2715","rgb":[172,39,21],"hsl":[7,78,38],"cmyk":[0,77,88,33],"luminance":0.1028,"contrast":{"black":3.06,"white":6.87}}
WCAG
{"AA":["#FFFFFF","#F5F5F5"],"AAA":[]}
Safe pairings
[{"name":"Black text","hex":"#000000","contrast":3.06,"wcagAA":false,"wcagAAA":false},{"name":"White text","hex":"#FFFFFF","contrast":6.87,"wcagAA":true,"wcagAAA":false}]
Accessible alternatives
[{"name":"#5B150B","hex":"#5B150B","family":"red","bestTextColor":"#FFFFFF","contrastBlack":1.56,"contrastWhite":13.5,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"#97372B","hex":"#97372B","family":"red","bestTextColor":"#FFFFFF","contrastBlack":2.9,"contrastWhite":7.25,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF"]},{"name":"Pompeian Red","hex":"#A42A04","family":"red","bestTextColor":"#FFFFFF","contrastBlack":2.91,"contrastWhite":7.21,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF"]},{"name":"Brown","hex":"#A52A2A","family":"red","bestTextColor":"#FFFFFF","contrastBlack":2.96,"contrastWhite":7.09,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF"]},{"name":"#AC154F","hex":"#AC154F","family":"pink","bestTextColor":"#FFFFFF","contrastBlack":2.97,"contrastWhite":7.06,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF"]}]
AI context
{"semanticGroups":["warm red","vibrant","vibrant red","Firebrick adjacent"],"useCases":["color conversion","WCAG contrast checks","CSS color tokens","high-energy accents","high-attention visual states"],"contrastSafeWith":["#FFFFFF","#F5F5F5"],"relatedEndpoints":["https://www.colorsencyclopedia.com/api/hex/ac2715.json","https://www.colorsencyclopedia.com/api/hex.json","https://www.colorsencyclopedia.com/api/colors/firebrick.json","https://www.colorsencyclopedia.com/api/colors/pompeian-red.json","https://www.colorsencyclopedia.com/api/colors/brown.json"]}
Harmonies
{"complementary":"#159BAC","analogous":["#AC154F","#AC7315"],"triadic":["#15AC27","#2715AC"],"tetradic":["#4FAC15","#159BAC","#7315AC"],"splitComplementary":["#15AC73","#154FAC"],"monochromatic":["#E64C37","#AC2715","#5B150B"]}
Variants
{"light":"#E64C37","dark":"#5B150B","saturated":"#C21700","desaturated":"#97372B","pastel":"#DC7365","neon":"#EB1B00"}
Nearest named colors
[{"slug":"firebrick","name":"Firebrick","hex":"#B22222","distance":15.165750888103101},{"slug":"pompeian-red","name":"Pompeian Red","hex":"#A42A04","distance":19.026297590440446},{"slug":"brown","name":"Brown","hex":"#A52A2A","distance":22.338307903688676},{"slug":"tool-red","name":"Tool Red","hex":"#B11226","distance":27.477263328068172},{"slug":"rust","name":"Rust","hex":"#B7410E","distance":29.086079144497972}]
Dataset manifest Version 1.0.0 Build hash published in manifest Canonical page

HEX meaning and use

About #AC2715

#AC2715 is classified as a warm red value with vibrant visual character. #AC2715 is visually closest to Firebrick, a named red color with HEX #B22222.

The RGB channels are 172, 39, and 21, with red carrying the strongest channel weight. In HSL, the hue is 7deg with 78% 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 0.1028, white text provides the stronger contrast for readable interface or documentation use, and Its nearest named-color distance is 15.17, which helps separate this atlas value from adjacent named color records.

WCAG Accessibility

Black text3.06:1AA Fail
White text6.87:1AA Pass

AA text options: #FFFFFF, #F5F5F5.

AAA text options: none in seed set.

Accessibility-Safe Pairings and Alternatives

Use these pairings when #AC2715 needs readable text, badges, interface states, or nearby accessible alternatives.

Black text#0000003.06:1 · Fail
White text#FFFFFF6.87:1 · AA

Accessible Alternatives

#5B150B#FFFFFF text · best 13.5:1#5B150B
#97372B#FFFFFF text · best 7.25:1#97372B
Pompeian Red#FFFFFF text · best 7.21:1#A42A04
Brown#FFFFFF text · best 7.09:1#A52A2A
#AC154F#FFFFFF text · best 7.06:1#AC154F

Generated Palette

#AC2715#AC2715
#159BAC#159BAC
#AC154F#AC154F
#AC7315#AC7315
#E64C37#E64C37
#5B150B#5B150B

Color Harmonies

#159BAC#159BAC
#AC154F#AC154F
#AC7315#AC7315
#15AC27#15AC27
#2715AC#2715AC

Variants

#E64C37#E64C37
#5B150B#5B150B
#C21700#C21700
#97372B#97372B
#DC7365#DC7365
#EB1B00#EB1B00

Nearest Named Colors

Firebrick#B22222
Pompeian Red#A42A04
Brown#A52A2A
Tool Red#B11226
Rust#B7410E

Related HEX Guides

Firebrick colorOpen the nearest named color reference for #B22222.Pompeian Red colorOpen the nearest named color reference for #A42A04.Brown colorOpen the nearest named color reference for #A52A2A.Red color familyBrowse named red 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.#AC2715 APIOpen the machine-readable JSON record for this HEX value.