#AC3731#AC3731

#AC3731 is a mid, vivid red. Relative luminance 0.117; OKLCH L 50.8% C 0.154 H 27.0°. Best body text is #FFFFFF at 6.28:1 contrast (WCAG AA passes).

Color values

HEX	#AC3731
RGB	rgb(172, 55, 49)
HSL	hsl(3, 56%, 43%)
HSV	hsv(3, 72%, 67%)
CMYK	cmyk(0%, 68%, 71.5%, 32.5%)
CIE-LAB	lab(40.78, 47.28, 30.47)
CIE-LCH	lch(40.78, 56.25, 32.80°)
OKLab	oklab(50.76% 0.1371 0.0698)
OKLCH	oklch(50.76% 0.154 27)
XYZ	xyz(18.9359, 11.7275, 4.1717)
Luminance	0.1172 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#AC3731 #31A6AC

analogous

#AC3168 #AC3731 #AC7431

triadic

#AC3731 #31AC37 #3731AC

tetradic

#AC3731 #68AC31 #31A6AC #7431AC

square

#AC3731 #68AC31 #31A6AC #7431AC

split-complementary

#AC3731 #31AC74 #3168AC

monochromatic

#4D1916 #7C2823 #AC3731 #CC544E #DA827D

Accessibility & contrast

On white

6.28

#AC3731 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.35

#AC3731 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #AC3731

6.28:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##AC3731	#FFFFFF	#000000	##FFFFFF
##AC3731	1.00	6.28	3.35	6.28
#FFFFFF	6.28	1.00	21.00	1.00
#000000	3.35	21.00	1.00	21.00
##FFFFFF	6.28	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#58502F

Deuteranopia (green-blind)

#756A2D

Tritanopia (blue-blind)

#BD1537

Achromatopsia (no color)

#606060

Design tokens & code

CSS

--color: #ac3731;
/* rgb */ color: rgb(172, 55, 49);
/* oklch */ color: oklch(50.8% 0.154 27.0);

Tailwind

colors: {
  custom: {
    50: '#cc7569',
    500: '#ac3731',
    950: '#000000',
  },
}

SCSS

$custom: #ac3731;
$custom-light: #cc7569;
$custom-dark: #000000;

JSON

{
  "hex": "#ac3731",
  "rgb": {
    "r": 172,
    "g": 55,
    "b": 49
  },
  "hsl": {
    "h": 2.927,
    "s": 55.656,
    "l": 43.333
  },
  "oklch": {
    "l": 0.50764,
    "c": 0.15382,
    "h": 27
  },
  "luminance": 0.11725
}

Semantic roles & 50–950 ramp

primary

#AC3731

secondary

#76BFC3

accent

#D8DF49

background

#FDF7F6

surface

#FBEDEB

border

#D4C8C6

text

#150906

muted

#837B7A

Preview Lab

Preview with #AC3731

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

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