#663B2F#663B2F

#663B2F is a dark, moderate red. Relative luminance 0.062; OKLCH L 40.2% C 0.064 H 36.4°. Best body text is #FFFFFF at 9.41:1 contrast (WCAG AA passes).

Color values

HEX	#663B2F
RGB	rgb(102, 59, 47)
HSL	hsl(13, 37%, 29%)
HSV	hsv(13, 54%, 40%)
CMYK	cmyk(0%, 42.2%, 53.9%, 60%)
CIE-LAB	lab(29.81, 17.55, 15.51)
CIE-LCH	lch(29.81, 23.42, 41.48°)
OKLab	oklab(40.15% 0.0519 0.0382)
OKLCH	oklch(40.15% 0.064 36.4)
XYZ	xyz(7.5570, 6.1586, 3.4795)
Luminance	0.0616 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#663B2F #2F5A66

analogous

#662F3F #663B2F #66572F

triadic

#663B2F #2F663B #3B2F66

tetradic

#663B2F #3F662F #2F5A66 #572F66

square

#663B2F #3F662F #2F5A66 #572F66

split-complementary

#663B2F #2F6657 #2F3F66

monochromatic

#150C0A #3C231C #663B2F #905342 #B46F5C

Accessibility & contrast

On white

9.41

#663B2F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.23

#663B2F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #663B2F

9.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##663B2F	#FFFFFF	#000000	##FFFFFF
##663B2F	1.00	9.41	2.23	9.41
#FFFFFF	9.41	1.00	21.00	1.00
#000000	2.23	21.00	1.00	21.00
##FFFFFF	9.41	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#46412E

Deuteranopia (green-blind)

#504A2E

Tritanopia (blue-blind)

#6F3438

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #663b2f;
/* rgb */ color: rgb(102, 59, 47);
/* oklch */ color: oklch(40.2% 0.064 36.4);

Tailwind

colors: {
  custom: {
    50: '#947167',
    500: '#663b2f',
    950: '#000000',
  },
}

SCSS

$custom: #663b2f;
$custom-light: #947167;
$custom-dark: #000000;

JSON

{
  "hex": "#663b2f",
  "rgb": {
    "r": 102,
    "g": 59,
    "b": 47
  },
  "hsl": {
    "h": 13.091,
    "s": 36.913,
    "l": 29.216
  },
  "oklch": {
    "l": 0.40152,
    "c": 0.06444,
    "h": 36.4
  },
  "luminance": 0.06158
}

Semantic roles & 50–950 ramp

primary

#663B2F

secondary

#598A98

accent

#B4CD5B

background

#F9F6F6

surface

#F2ECEB

border

#CCC7C6

text

#0D0706

muted

#7E7A7A

Preview Lab

Preview with #663B2F

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

Preview Lab → · Contrast checker → · Palette generator →