#663A3E#663A3E

#663A3E is a dark, moderate red. Relative luminance 0.062; OKLCH L 40.3% C 0.062 H 14.4°. Best body text is #FFFFFF at 9.38:1 contrast (WCAG AA passes).

Color values

HEX	#663A3E
RGB	rgb(102, 58, 62)
HSL	hsl(355, 28%, 31%)
HSV	hsv(355, 43%, 40%)
CMYK	cmyk(0%, 43.1%, 39.2%, 60%)
CIE-LAB	lab(29.91, 19.97, 5.95)
CIE-LCH	lch(29.91, 20.84, 16.59°)
OKLab	oklab(40.35% 0.0605 0.0155)
OKLCH	oklch(40.35% 0.062 14.4)
XYZ	xyz(7.8624, 6.1993, 5.3390)
Luminance	0.0620 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#663A3E #3A6662

analogous

#663A54 #663A3E #664C3A

triadic

#663A3E #3E663A #3A3E66

tetradic

#663A3E #54663A #3A6662 #4C3A66

square

#663A3E #54663A #3A6662 #4C3A66

split-complementary

#663A3E #3A664C #3A5466

monochromatic

#180E0F #3F2426 #663A3E #8D5056 #AC6E74

Accessibility & contrast

On white

9.38

#663A3E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.24

#663A3E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #663A3E

9.38:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##663A3E	#FFFFFF	#000000	##FFFFFF
##663A3E	1.00	9.38	2.24	9.38
#FFFFFF	9.38	1.00	21.00	1.00
#000000	2.24	21.00	1.00	21.00
##FFFFFF	9.38	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#42413E

Deuteranopia (green-blind)

#4D4A3D

Tritanopia (blue-blind)

#6E353C

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #663a3e;
/* rgb */ color: rgb(102, 58, 62);
/* oklch */ color: oklch(40.3% 0.062 14.4);

Tailwind

colors: {
  custom: {
    50: '#937173',
    500: '#663a3e',
    950: '#000000',
  },
}

SCSS

$custom: #663a3e;
$custom-light: #937173;
$custom-dark: #000000;

JSON

{
  "hex": "#663a3e",
  "rgb": {
    "r": 102,
    "g": 58,
    "b": 62
  },
  "hsl": {
    "h": 354.545,
    "s": 27.5,
    "l": 31.373
  },
  "oklch": {
    "l": 0.40345,
    "c": 0.06248,
    "h": 14.4
  },
  "luminance": 0.06199
}

Semantic roles & 50–950 ramp

primary

#663A3E

secondary

#669692

accent

#C4BB64

background

#F9F6F6

surface

#F1ECEC

border

#CBC7C7

text

#0D0708

muted

#7E7A7B

Preview Lab

Preview with #663A3E

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

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