#AC3837#AC3837

#AC3837 is a mid, vivid red. Relative luminance 0.119; OKLCH L 51.0% C 0.152 H 24.7°. Best body text is #FFFFFF at 6.22:1 contrast (WCAG AA passes).

Color values

HEX	#AC3837
RGB	rgb(172, 56, 55)
HSL	hsl(1, 52%, 45%)
HSV	hsv(1, 68%, 67%)
CMYK	cmyk(0%, 67.4%, 68%, 32.5%)
CIE-LAB	lab(41.02, 47.18, 27.18)
CIE-LCH	lch(41.02, 54.45, 29.94°)
OKLab	oklab(50.97% 0.138 0.0635)
OKLCH	oklch(50.97% 0.152 24.7)
XYZ	xyz(19.1190, 11.8776, 4.8995)
Luminance	0.1187 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#AC3837 #37ABAC

analogous

#AC3771 #AC3837 #AC7337

triadic

#AC3837 #37AC38 #3837AC

tetradic

#AC3837 #71AC37 #37ABAC #7337AC

square

#AC3837 #71AC37 #37ABAC #7337AC

split-complementary

#AC3837 #37AC73 #3771AC

monochromatic

#4F1A19 #7E2928 #AC3837 #C95857 #D88685

Accessibility & contrast

On white

6.22

#AC3837 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.38

#AC3837 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #AC3837

6.22:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##AC3837	#FFFFFF	#000000	##FFFFFF
##AC3837	1.00	6.22	3.38	6.22
#FFFFFF	6.22	1.00	21.00	1.00
#000000	3.38	21.00	1.00	21.00
##FFFFFF	6.22	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#585136

Deuteranopia (green-blind)

#756A34

Tritanopia (blue-blind)

#BD1A39

Achromatopsia (no color)

#616161

Design tokens & code

CSS

--color: #ac3837;
/* rgb */ color: rgb(172, 56, 55);
/* oklch */ color: oklch(51.0% 0.152 24.7);

Tailwind

colors: {
  custom: {
    50: '#cc756e',
    500: '#ac3837',
    950: '#000000',
  },
}

SCSS

$custom: #ac3837;
$custom-light: #cc756e;
$custom-dark: #000000;

JSON

{
  "hex": "#ac3837",
  "rgb": {
    "r": 172,
    "g": 56,
    "b": 55
  },
  "hsl": {
    "h": 0.513,
    "s": 51.542,
    "l": 44.51
  },
  "oklch": {
    "l": 0.50972,
    "c": 0.15193,
    "h": 24.7
  },
  "luminance": 0.11875
}

Semantic roles & 50–950 ramp

primary

#AC3837

secondary

#7DC1C2

accent

#DADB4D

background

#FDF7F6

surface

#FAEDEB

border

#D3C8C6

text

#150907

muted

#837B7A

Preview Lab

Preview with #AC3837

Body copy rendered with the generated semantic roles for this colour.

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