#AD2B21#AD2B21

#AD2B21 is a mid, vivid red. Relative luminance 0.107; OKLCH L 49.5% C 0.168 H 29.1°. Best body text is #FFFFFF at 6.68:1 contrast (WCAG AA passes).

Color values

HEX	#AD2B21
RGB	rgb(173, 43, 33)
HSL	hsl(4, 68%, 40%)
HSV	hsv(4, 81%, 68%)
CMYK	cmyk(0%, 75.1%, 80.9%, 32.2%)
CIE-LAB	lab(39.11, 51.55, 37.87)
CIE-LCH	lch(39.11, 63.97, 36.30°)
OKLab	oklab(49.49% 0.147 0.0817)
OKLCH	oklch(49.49% 0.168 29.1)
XYZ	xyz(18.3742, 10.7247, 2.5411)
Luminance	0.1072 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#AD2B21 #21A3AD

analogous

#AD215D #AD2B21 #AD7121

triadic

#AD2B21 #21AD2B #2B21AD

tetradic

#AD2B21 #5DAD21 #21A3AD #7121AD

square

#AD2B21 #5DAD21 #21A3AD #7121AD

split-complementary

#AD2B21 #21AD71 #215DAD

monochromatic

#46110D #7A1E17 #AD2B21 #D83F33 #E26F66

Accessibility & contrast

On white

6.68

#AD2B21 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.14

#AD2B21 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #AD2B21

6.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##AD2B21	#FFFFFF	#000000	##FFFFFF
##AD2B21	1.00	6.68	3.14	6.68
#FFFFFF	6.68	1.00	21.00	1.00
#000000	3.14	21.00	1.00	21.00
##FFFFFF	6.68	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#534A1E

Deuteranopia (green-blind)

#73661B

Tritanopia (blue-blind)

#BF002A

Achromatopsia (no color)

#5C5C5C

Design tokens & code

CSS

--color: #ad2b21;
/* rgb */ color: rgb(173, 43, 33);
/* oklch */ color: oklch(49.5% 0.168 29.1);

Tailwind

colors: {
  custom: {
    50: '#cf6f5e',
    500: '#ad2b21',
    950: '#000000',
  },
}

SCSS

$custom: #ad2b21;
$custom-light: #cf6f5e;
$custom-dark: #000000;

JSON

{
  "hex": "#ad2b21",
  "rgb": {
    "r": 173,
    "g": 43,
    "b": 33
  },
  "hsl": {
    "h": 4.286,
    "s": 67.961,
    "l": 40.392
  },
  "oklch": {
    "l": 0.49493,
    "c": 0.16819,
    "h": 29.1
  },
  "luminance": 0.10722
}

Semantic roles & 50–950 ramp

primary

#AD2B21

secondary

#62C0C7

accent

#DEEB3D

background

#FEF7F5

surface

#FCEDE9

border

#D5C8C5

text

#160804

muted

#847B79

Preview Lab

Preview with #AD2B21

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

Preview Lab → · Contrast checker → · Palette generator →