#AC3639#AC3639

#AC3639 is a mid, vivid red. Relative luminance 0.117; OKLCH L 50.8% C 0.154 H 23.1°. Best body text is #FFFFFF at 6.29:1 contrast (WCAG AA passes).

Color values

HEX	#AC3639
RGB	rgb(172, 54, 57)
HSL	hsl(358, 52%, 44%)
HSV	hsv(358, 69%, 67%)
CMYK	cmyk(0%, 68.6%, 66.9%, 32.5%)
CIE-LAB	lab(40.75, 48.13, 25.63)
CIE-LCH	lch(40.75, 54.53, 28.03°)
OKLab	oklab(50.78% 0.1414 0.0604)
OKLCH	oklch(50.78% 0.154 23.1)
XYZ	xyz(19.0729, 11.7071, 5.1255)
Luminance	0.1170 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#AC3639 #36ACA9

analogous

#AC3674 #AC3639 #AC6E36

triadic

#AC3639 #39AC36 #3639AC

tetradic

#AC3639 #74AC36 #36ACA9 #6E36AC

square

#AC3639 #74AC36 #36ACA9 #6E36AC

split-complementary

#AC3639 #36AC6E #3674AC

monochromatic

#4F191A #7D272A #AC3639 #CA5558 #D88486

Accessibility & contrast

On white

6.29

#AC3639 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.34

#AC3639 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #AC3639

6.29:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##AC3639	#FFFFFF	#000000	##FFFFFF
##AC3639	1.00	6.29	3.34	6.29
#FFFFFF	6.29	1.00	21.00	1.00
#000000	3.34	21.00	1.00	21.00
##FFFFFF	6.29	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#565038

Deuteranopia (green-blind)

#746936

Tritanopia (blue-blind)

#BD1638

Achromatopsia (no color)

#606060

Design tokens & code

CSS

--color: #ac3639;
/* rgb */ color: rgb(172, 54, 57);
/* oklch */ color: oklch(50.8% 0.154 23.1);

Tailwind

colors: {
  custom: {
    50: '#cc746f',
    500: '#ac3639',
    950: '#000000',
  },
}

SCSS

$custom: #ac3639;
$custom-light: #cc746f;
$custom-dark: #000000;

JSON

{
  "hex": "#ac3639",
  "rgb": {
    "r": 172,
    "g": 54,
    "b": 57
  },
  "hsl": {
    "h": 358.475,
    "s": 52.212,
    "l": 44.314
  },
  "oklch": {
    "l": 0.50777,
    "c": 0.15376,
    "h": 23.1
  },
  "luminance": 0.11704
}

Semantic roles & 50–950 ramp

primary

#AC3639

secondary

#7CC2C0

accent

#DCD84C

background

#FDF7F6

surface

#FAEDEC

border

#D3C8C7

text

#150907

muted

#837B7A

Preview Lab

Preview with #AC3639

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

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