#AC3738#AC3738

#AC3738 is a mid, vivid red. Relative luminance 0.118; OKLCH L 50.9% C 0.153 H 23.9°. Best body text is #FFFFFF at 6.25:1 contrast (WCAG AA passes).

Color values

HEX	#AC3738
RGB	rgb(172, 55, 56)
HSL	hsl(359, 52%, 45%)
HSV	hsv(359, 68%, 67%)
CMYK	cmyk(0%, 68%, 67.4%, 32.5%)
CIE-LAB	lab(40.88, 47.66, 26.40)
CIE-LCH	lch(40.88, 54.48, 28.98°)
OKLab	oklab(50.87% 0.1397 0.062)
OKLCH	oklch(50.87% 0.153 23.9)
XYZ	xyz(19.0952, 11.7913, 5.0111)
Luminance	0.1179 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#AC3738 #37ACAB

analogous

#AC3773 #AC3738 #AC7137

triadic

#AC3738 #38AC37 #3738AC

tetradic

#AC3738 #73AC37 #37ACAB #7137AC

square

#AC3738 #73AC37 #37ACAB #7137AC

split-complementary

#AC3738 #37AC71 #3773AC

monochromatic

#4F191A #7E2829 #AC3738 #C95758 #D88586

Accessibility & contrast

On white

6.25

#AC3738 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.36

#AC3738 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #AC3738

6.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##AC3738	#FFFFFF	#000000	##FFFFFF
##AC3738	1.00	6.25	3.36	6.25
#FFFFFF	6.25	1.00	21.00	1.00
#000000	3.36	21.00	1.00	21.00
##FFFFFF	6.25	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#575037

Deuteranopia (green-blind)

#746A35

Tritanopia (blue-blind)

#BD1839

Achromatopsia (no color)

#606060

Design tokens & code

CSS

--color: #ac3738;
/* rgb */ color: rgb(172, 55, 56);
/* oklch */ color: oklch(50.9% 0.153 23.9);

Tailwind

colors: {
  custom: {
    50: '#cc756e',
    500: '#ac3738',
    950: '#000000',
  },
}

SCSS

$custom: #ac3738;
$custom-light: #cc756e;
$custom-dark: #000000;

JSON

{
  "hex": "#ac3738",
  "rgb": {
    "r": 172,
    "g": 55,
    "b": 56
  },
  "hsl": {
    "h": 359.487,
    "s": 51.542,
    "l": 44.51
  },
  "oklch": {
    "l": 0.50874,
    "c": 0.15284,
    "h": 23.9
  },
  "luminance": 0.11789
}

Semantic roles & 50–950 ramp

primary

#AC3738

secondary

#7DC2C1

accent

#DBDA4D

background

#FDF7F6

surface

#FAEDEC

border

#D3C8C7

text

#150907

muted

#837B7A

Preview Lab

Preview with #AC3738

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

Preview Lab → · Contrast checker → · Palette generator →