#AC381F#AC381F

#AC381F is a mid, vivid red. Relative luminance 0.117; OKLCH L 50.7% C 0.156 H 33.7°. Best body text is #FFFFFF at 6.29:1 contrast (WCAG AA passes).

Color values

HEX	#AC381F
RGB	rgb(172, 56, 31)
HSL	hsl(11, 69%, 40%)
HSV	hsv(11, 82%, 67%)
CMYK	cmyk(0%, 67.4%, 82%, 32.5%)
CIE-LAB	lab(40.74, 46.13, 40.44)
CIE-LCH	lch(40.74, 61.35, 41.24°)
OKLab	oklab(50.67% 0.1299 0.0867)
OKLCH	oklch(50.67% 0.156 33.7)
XYZ	xyz(18.6769, 11.7007, 2.5711)
Luminance	0.1170 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#AC381F #1F93AC

analogous

#AC1F4D #AC381F #AC7E1F

triadic

#AC381F #1FAC38 #381FAC

tetradic

#AC381F #4DAC1F #1F93AC #7E1FAC

square

#AC381F #4DAC1F #1F93AC #7E1FAC

split-complementary

#AC381F #1FAC7E #1F4DAC

monochromatic

#44160C #782716 #AC381F #D94D2F #E37963

Accessibility & contrast

On white

6.29

#AC381F on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.34

#AC381F on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #AC381F

6.29:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##AC381F	#FFFFFF	#000000	##FFFFFF
##AC381F	1.00	6.29	3.34	6.29
#FFFFFF	6.29	1.00	21.00	1.00
#000000	3.34	21.00	1.00	21.00
##FFFFFF	6.29	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5A501B

Deuteranopia (green-blind)

#766A1A

Tritanopia (blue-blind)

#BE1333

Achromatopsia (no color)

#606060

Design tokens & code

CSS

--color: #ac381f;
/* rgb */ color: rgb(172, 56, 31);
/* oklch */ color: oklch(50.7% 0.156 33.7);

Tailwind

colors: {
  custom: {
    50: '#cd755d',
    500: '#ac381f',
    950: '#000000',
  },
}

SCSS

$custom: #ac381f;
$custom-light: #cd755d;
$custom-dark: #000000;

JSON

{
  "hex": "#ac381f",
  "rgb": {
    "r": 172,
    "g": 56,
    "b": 31
  },
  "hsl": {
    "h": 10.638,
    "s": 69.458,
    "l": 39.804
  },
  "oklch": {
    "l": 0.50668,
    "c": 0.15618,
    "h": 33.7
  },
  "luminance": 0.11698
}

Semantic roles & 50–950 ramp

primary

#AC381F

secondary

#5FB5C8

accent

#CDEC3C

background

#FDF7F5

surface

#FBEDE9

border

#D4C8C5

text

#150904

muted

#837B79

Preview Lab

Preview with #AC381F

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

Preview Lab → · Contrast checker → · Palette generator →