#663A36#663A36

#663A36 is a dark, moderate red. Relative luminance 0.061; OKLCH L 40.1% C 0.063 H 25.8°. Best body text is #FFFFFF at 9.44:1 contrast (WCAG AA passes).

Color values

HEX	#663A36
RGB	rgb(102, 58, 54)
HSL	hsl(5, 31%, 31%)
HSV	hsv(5, 47%, 40%)
CMYK	cmyk(0%, 43.1%, 47.1%, 60%)
CIE-LAB	lab(29.71, 18.94, 10.87)
CIE-LCH	lch(29.71, 21.84, 29.86°)
OKLab	oklab(40.12% 0.0569 0.0275)
OKLCH	oklch(40.12% 0.063 25.8)
XYZ	xyz(7.6588, 6.1179, 4.2668)
Luminance	0.0612 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#663A36 #366266

analogous

#66364A #663A36 #665236

triadic

#663A36 #36663A #3A3666

tetradic

#663A36 #4A6636 #366266 #523666

square

#663A36 #4A6636 #366266 #523666

split-complementary

#663A36 #366652 #364A66

monochromatic

#160C0C #3E2321 #663A36 #8E514B #AF6E68

Accessibility & contrast

On white

9.44

#663A36 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.22

#663A36 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #663A36

9.44:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##663A36	#FFFFFF	#000000	##FFFFFF
##663A36	1.00	9.44	2.22	9.44
#FFFFFF	9.44	1.00	21.00	1.00
#000000	2.22	21.00	1.00	21.00
##FFFFFF	9.44	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#444136

Deuteranopia (green-blind)

#4E4935

Tritanopia (blue-blind)

#6E3439

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #663a36;
/* rgb */ color: rgb(102, 58, 54);
/* oklch */ color: oklch(40.1% 0.063 25.8);

Tailwind

colors: {
  custom: {
    50: '#94716d',
    500: '#663a36',
    950: '#000000',
  },
}

SCSS

$custom: #663a36;
$custom-light: #94716d;
$custom-dark: #000000;

JSON

{
  "hex": "#663a36",
  "rgb": {
    "r": 102,
    "g": 58,
    "b": 54
  },
  "hsl": {
    "h": 5,
    "s": 30.769,
    "l": 30.588
  },
  "oklch": {
    "l": 0.40124,
    "c": 0.06322,
    "h": 25.8
  },
  "luminance": 0.06117
}

Semantic roles & 50–950 ramp

primary

#663A36

secondary

#619297

accent

#BEC761

background

#F9F6F6

surface

#F2ECEB

border

#CCC7C6

text

#0D0707

muted

#7E7A7A

Preview Lab

Preview with #663A36

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

Preview Lab → · Contrast checker → · Palette generator →