#AC3737#AC3737

#AC3737 is a mid, vivid red. Relative luminance 0.118; OKLCH L 50.9% C 0.153 H 24.4°. Best body text is #FFFFFF at 6.26:1 contrast (WCAG AA passes).

Color values

HEX	#AC3737
RGB	rgb(172, 55, 55)
HSL	hsl(0, 52%, 45%)
HSV	hsv(0, 68%, 67%)
CMYK	cmyk(0%, 68%, 68%, 32.5%)
CIE-LAB	lab(40.87, 47.60, 26.99)
CIE-LCH	lch(40.87, 54.72, 29.55°)
OKLab	oklab(50.86% 0.1393 0.0631)
OKLCH	oklch(50.86% 0.153 24.4)
XYZ	xyz(19.0710, 11.7816, 4.8835)
Luminance	0.1178 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#AC3737 #37ACAC

analogous

#AC3772 #AC3737 #AC7237

triadic

#AC3737 #37AC37 #3737AC

tetradic

#AC3737 #72AC37 #37ACAC #7237AC

square

#AC3737 #72AC37 #37ACAC #7237AC

split-complementary

#AC3737 #37AC72 #3772AC

monochromatic

#4F1919 #7E2828 #AC3737 #C95757 #D88585

Accessibility & contrast

On white

6.26

#AC3737 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.36

#AC3737 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #AC3737

6.26:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##AC3737	#FFFFFF	#000000	##FFFFFF
##AC3737	1.00	6.26	3.36	6.26
#FFFFFF	6.26	1.00	21.00	1.00
#000000	3.36	21.00	1.00	21.00
##FFFFFF	6.26	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#575036

Deuteranopia (green-blind)

#746A34

Tritanopia (blue-blind)

#BD1838

Achromatopsia (no color)

#606060

Design tokens & code

CSS

--color: #ac3737;
/* rgb */ color: rgb(172, 55, 55);
/* oklch */ color: oklch(50.9% 0.153 24.4);

Tailwind

colors: {
  custom: {
    50: '#cc756e',
    500: '#ac3737',
    950: '#000000',
  },
}

SCSS

$custom: #ac3737;
$custom-light: #cc756e;
$custom-dark: #000000;

JSON

{
  "hex": "#ac3737",
  "rgb": {
    "r": 172,
    "g": 55,
    "b": 55
  },
  "hsl": {
    "h": 0,
    "s": 51.542,
    "l": 44.51
  },
  "oklch": {
    "l": 0.50857,
    "c": 0.15296,
    "h": 24.4
  },
  "luminance": 0.11779
}

Semantic roles & 50–950 ramp

primary

#AC3737

secondary

#7DC2C2

accent

#DBDB4D

background

#FDF7F6

surface

#FAEDEB

border

#D3C8C6

text

#150907

muted

#837B7A

Preview Lab

Preview with #AC3737

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

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