#663E1B#663E1B

#663E1B is a dark, moderate orange. Relative luminance 0.063; OKLCH L 40.4% C 0.074 H 59.3°. Best body text is #FFFFFF at 9.25:1 contrast (WCAG AA passes).

Color values

HEX	#663E1B
RGB	rgb(102, 62, 27)
HSL	hsl(28, 58%, 25%)
HSV	hsv(28, 74%, 40%)
CMYK	cmyk(0%, 39.2%, 73.5%, 60%)
CIE-LAB	lab(30.28, 14.03, 28.17)
CIE-LCH	lch(30.28, 31.47, 63.52°)
OKLab	oklab(40.41% 0.038 0.0639)
OKLCH	oklch(40.41% 0.074 59.3)
XYZ	xyz(7.4005, 6.3499, 1.8726)
Luminance	0.0635 (WCAG relative)
Temperature	warm
Family	orange

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#663E1B #1B4366

analogous

#661B1D #663E1B #66631B

triadic

#663E1B #1B663E #3E1B66

tetradic

#663E1B #1D661B #1B4366 #631B66

square

#663E1B #1D661B #1B4366 #631B66

split-complementary

#663E1B #1B6663 #1B1D66

monochromatic

#180F06 #36210E #663E1B #965B28 #C77935

Accessibility & contrast

On white

9.25

#663E1B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.27

#663E1B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #663E1B

9.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##663E1B	#FFFFFF	#000000	##FFFFFF
##663E1B	1.00	9.25	2.27	9.25
#FFFFFF	9.25	1.00	21.00	1.00
#000000	2.27	21.00	1.00	21.00
##FFFFFF	9.25	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4A4217

Deuteranopia (green-blind)

#544B1B

Tritanopia (blue-blind)

#703536

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #663e1b;
/* rgb */ color: rgb(102, 62, 27);
/* oklch */ color: oklch(40.4% 0.074 59.3);

Tailwind

colors: {
  custom: {
    50: '#957359',
    500: '#663e1b',
    950: '#000000',
  },
}

SCSS

$custom: #663e1b;
$custom-light: #957359;
$custom-dark: #000000;

JSON

{
  "hex": "#663e1b",
  "rgb": {
    "r": 102,
    "g": 62,
    "b": 27
  },
  "hsl": {
    "h": 28,
    "s": 58.14,
    "l": 25.294
  },
  "oklch": {
    "l": 0.40414,
    "c": 0.07435,
    "h": 59.3
  },
  "luminance": 0.06349
}

Semantic roles & 50–950 ramp

primary

#663E1B

secondary

#41719B

accent

#99E146

background

#F9F7F5

surface

#F2EDE9

border

#CCC8C5

text

#0E0803

muted

#7E7B78

Preview Lab

Preview with #663E1B

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

Preview Lab → · Contrast checker → · Palette generator →