#663B34#663B34

#663B34 is a dark, moderate red. Relative luminance 0.062; OKLCH L 40.3% C 0.063 H 30.0°. Best body text is #FFFFFF at 9.37:1 contrast (WCAG AA passes).

Color values

HEX	#663B34
RGB	rgb(102, 59, 52)
HSL	hsl(8, 32%, 30%)
HSV	hsv(8, 49%, 40%)
CMYK	cmyk(0%, 42.2%, 49%, 60%)
CIE-LAB	lab(29.91, 18.10, 12.45)
CIE-LCH	lch(29.91, 21.97, 34.52°)
OKLab	oklab(40.27% 0.0542 0.0312)
OKLCH	oklch(40.27% 0.063 30)
XYZ	xyz(7.6637, 6.2013, 4.0415)
Luminance	0.0620 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#663B34 #345F66

analogous

#663446 #663B34 #665434

triadic

#663B34 #34663B #3B3466

tetradic

#663B34 #466634 #345F66 #543466

square

#663B34 #466634 #345F66 #543466

split-complementary

#663B34 #346654 #344666

monochromatic

#150C0B #3D241F #663B34 #8F5249 #B06F64

Accessibility & contrast

On white

9.37

#663B34 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.24

#663B34 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #663B34

9.37:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##663B34	#FFFFFF	#000000	##FFFFFF
##663B34	1.00	9.37	2.24	9.37
#FFFFFF	9.37	1.00	21.00	1.00
#000000	2.24	21.00	1.00	21.00
##FFFFFF	9.37	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#454133

Deuteranopia (green-blind)

#4F4A33

Tritanopia (blue-blind)

#6E3539

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #663b34;
/* rgb */ color: rgb(102, 59, 52);
/* oklch */ color: oklch(40.3% 0.063 30.0);

Tailwind

colors: {
  custom: {
    50: '#94716b',
    500: '#663b34',
    950: '#000000',
  },
}

SCSS

$custom: #663b34;
$custom-light: #94716b;
$custom-dark: #000000;

JSON

{
  "hex": "#663b34",
  "rgb": {
    "r": 102,
    "g": 59,
    "b": 52
  },
  "hsl": {
    "h": 8.4,
    "s": 32.468,
    "l": 30.196
  },
  "oklch": {
    "l": 0.40268,
    "c": 0.06252,
    "h": 30
  },
  "luminance": 0.06201
}

Semantic roles & 50–950 ramp

primary

#663B34

secondary

#5F8F97

accent

#BAC95F

background

#F9F6F6

surface

#F2ECEB

border

#CCC7C6

text

#0D0806

muted

#7E7B7A

Preview Lab

Preview with #663B34

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

Preview Lab → · Contrast checker → · Palette generator →