#AD3740#AD3740

#AD3740 is a mid, vivid red. Relative luminance 0.120; OKLCH L 51.2% C 0.153 H 20.2°. Best body text is #FFFFFF at 6.18:1 contrast (WCAG AA passes).

Color values

HEX	#AD3740
RGB	rgb(173, 55, 64)
HSL	hsl(355, 52%, 45%)
HSV	hsv(355, 68%, 68%)
CMYK	cmyk(0%, 68.2%, 63%, 32.2%)
CIE-LAB	lab(41.20, 48.48, 21.94)
CIE-LCH	lch(41.20, 53.22, 24.35°)
OKLab	oklab(51.19% 0.1438 0.0528)
OKLCH	oklch(51.19% 0.153 20.2)
XYZ	xyz(19.5271, 11.9895, 6.1355)
Luminance	0.1199 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#AD3740 #37ADA4

analogous

#AD377B #AD3740 #AD6937

triadic

#AD3740 #40AD37 #3740AD

tetradic

#AD3740 #7BAD37 #37ADA4 #6937AD

square

#AD3740 #7BAD37 #37ADA4 #6937AD

split-complementary

#AD3740 #37AD69 #377BAD

monochromatic

#50191E #7F282F #AD3740 #CA5760 #D8868C

Accessibility & contrast

On white

6.18

#AD3740 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.40

#AD3740 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #AD3740

6.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##AD3740	#FFFFFF	#000000	##FFFFFF
##AD3740	1.00	6.18	3.40	6.18
#FFFFFF	6.18	1.00	21.00	1.00
#000000	3.40	21.00	1.00	21.00
##FFFFFF	6.18	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#56513F

Deuteranopia (green-blind)

#746A3D

Tritanopia (blue-blind)

#BE1A3B

Achromatopsia (no color)

#616161

Design tokens & code

CSS

--color: #ad3740;
/* rgb */ color: rgb(173, 55, 64);
/* oklch */ color: oklch(51.2% 0.153 20.2);

Tailwind

colors: {
  custom: {
    50: '#cc7574',
    500: '#ad3740',
    950: '#000000',
  },
}

SCSS

$custom: #ad3740;
$custom-light: #cc7574;
$custom-dark: #000000;

JSON

{
  "hex": "#ad3740",
  "rgb": {
    "r": 173,
    "g": 55,
    "b": 64
  },
  "hsl": {
    "h": 355.424,
    "s": 51.754,
    "l": 44.706
  },
  "oklch": {
    "l": 0.51188,
    "c": 0.1532,
    "h": 20.2
  },
  "luminance": 0.11987
}

Semantic roles & 50–950 ramp

primary

#AD3740

secondary

#7DC2BD

accent

#DBD04D

background

#FDF7F7

surface

#FAEDED

border

#D3C8C8

text

#150908

muted

#837B7B

Preview Lab

Preview with #AD3740

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

Preview Lab → · Contrast checker → · Palette generator →