#AC3740#AC3740

#AC3740 is a mid, vivid red. Relative luminance 0.119; OKLCH L 51.0% C 0.152 H 20.1°. Best body text is #FFFFFF at 6.22:1 contrast (WCAG AA passes).

Color values

HEX	#AC3740
RGB	rgb(172, 55, 64)
HSL	hsl(355, 52%, 45%)
HSV	hsv(355, 68%, 67%)
CMYK	cmyk(0%, 68%, 62.8%, 32.5%)
CIE-LAB	lab(41.02, 48.15, 21.67)
CIE-LCH	lch(41.02, 52.80, 24.23°)
OKLab	oklab(51.02% 0.1429 0.0522)
OKLCH	oklch(51.02% 0.152 20.1)
XYZ	xyz(19.3068, 11.8759, 6.1251)
Luminance	0.1187 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#AC3740 #37ACA3

analogous

#AC377A #AC3740 #AC6937

triadic

#AC3740 #40AC37 #3740AC

tetradic

#AC3740 #7AAC37 #37ACA3 #6937AC

square

#AC3740 #7AAC37 #37ACA3 #6937AC

split-complementary

#AC3740 #37AC69 #377AAC

monochromatic

#4F191D #7E282F #AC3740 #C95760 #D8858C

Accessibility & contrast

On white

6.22

#AC3740 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.37

#AC3740 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #AC3740

6.22:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##AC3740	#FFFFFF	#000000	##FFFFFF
##AC3740	1.00	6.22	3.37	6.22
#FFFFFF	6.22	1.00	21.00	1.00
#000000	3.37	21.00	1.00	21.00
##FFFFFF	6.22	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#565140

Deuteranopia (green-blind)

#736A3D

Tritanopia (blue-blind)

#BC1B3B

Achromatopsia (no color)

#616161

Design tokens & code

CSS

--color: #ac3740;
/* rgb */ color: rgb(172, 55, 64);
/* oklch */ color: oklch(51.0% 0.152 20.1);

Tailwind

colors: {
  custom: {
    50: '#cb7574',
    500: '#ac3740',
    950: '#000000',
  },
}

SCSS

$custom: #ac3740;
$custom-light: #cb7574;
$custom-dark: #000000;

JSON

{
  "hex": "#ac3740",
  "rgb": {
    "r": 172,
    "g": 55,
    "b": 64
  },
  "hsl": {
    "h": 355.385,
    "s": 51.542,
    "l": 44.51
  },
  "oklch": {
    "l": 0.51019,
    "c": 0.15212,
    "h": 20.1
  },
  "luminance": 0.11873
}

Semantic roles & 50–950 ramp

primary

#AC3740

secondary

#7DC2BD

accent

#DBD04D

background

#FDF7F7

surface

#FAEDED

border

#D3C8C8

text

#150908

muted

#837B7B

Preview Lab

Preview with #AC3740

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

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