#AC3728#AC3728

#AC3728 is a mid, vivid red. Relative luminance 0.117; OKLCH L 50.6% C 0.155 H 30.5°. Best body text is #FFFFFF at 6.30:1 contrast (WCAG AA passes).

Color values

HEX	#AC3728
RGB	rgb(172, 55, 40)
HSL	hsl(7, 62%, 42%)
HSV	hsv(7, 77%, 67%)
CMYK	cmyk(0%, 68%, 76.7%, 32.5%)
CIE-LAB	lab(40.67, 46.88, 35.54)
CIE-LCH	lch(40.67, 58.83, 37.17°)
OKLab	oklab(50.65% 0.1339 0.0788)
OKLCH	oklch(50.65% 0.155 30.5)
XYZ	xyz(18.7646, 11.6590, 3.2694)
Luminance	0.1166 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#AC3728 #289DAC

analogous

#AC285B #AC3728 #AC7928

triadic

#AC3728 #28AC37 #3728AC

tetradic

#AC3728 #5BAC28 #289DAC #7928AC

square

#AC3728 #5BAC28 #289DAC #7928AC

split-complementary

#AC3728 #28AC79 #285BAC

monochromatic

#491711 #7A271C #AC3728 #D2503F #DE7D71

Accessibility & contrast

On white

6.30

#AC3728 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.33

#AC3728 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #AC3728

6.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##AC3728	#FFFFFF	#000000	##FFFFFF
##AC3728	1.00	6.30	3.33	6.30
#FFFFFF	6.30	1.00	21.00	1.00
#000000	3.33	21.00	1.00	21.00
##FFFFFF	6.30	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#585025

Deuteranopia (green-blind)

#766924

Tritanopia (blue-blind)

#BD1334

Achromatopsia (no color)

#606060

Design tokens & code

CSS

--color: #ac3728;
/* rgb */ color: rgb(172, 55, 40);
/* oklch */ color: oklch(50.6% 0.155 30.5);

Tailwind

colors: {
  custom: {
    50: '#cd7463',
    500: '#ac3728',
    950: '#000000',
  },
}

SCSS

$custom: #ac3728;
$custom-light: #cd7463;
$custom-dark: #000000;

JSON

{
  "hex": "#ac3728",
  "rgb": {
    "r": 172,
    "g": 55,
    "b": 40
  },
  "hsl": {
    "h": 6.818,
    "s": 62.264,
    "l": 41.569
  },
  "oklch": {
    "l": 0.50645,
    "c": 0.15539,
    "h": 30.5
  },
  "luminance": 0.11656
}

Semantic roles & 50–950 ramp

primary

#AC3728

secondary

#6BBBC5

accent

#D3E542

background

#FDF7F5

surface

#FBEDEA

border

#D4C8C6

text

#150905

muted

#837B79

Preview Lab

Preview with #AC3728

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

Preview Lab → · Contrast checker → · Palette generator →