#663F1B#663F1B

#663F1B is a dark, moderate orange. Relative luminance 0.065; OKLCH L 40.6% C 0.074 H 60.8°. Best body text is #FFFFFF at 9.16:1 contrast (WCAG AA passes).

Color values

HEX	#663F1B
RGB	rgb(102, 63, 27)
HSL	hsl(29, 58%, 25%)
HSV	hsv(29, 74%, 40%)
CMYK	cmyk(0%, 38.2%, 73.5%, 60%)
CIE-LAB	lab(30.54, 13.41, 28.46)
CIE-LCH	lch(30.54, 31.46, 64.76°)
OKLab	oklab(40.62% 0.0361 0.0646)
OKLCH	oklch(40.62% 0.074 60.8)
XYZ	xyz(7.4554, 6.4596, 1.8909)
Luminance	0.0646 (WCAG relative)
Temperature	warm
Family	orange

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#663F1B #1B4266

analogous

#661B1C #663F1B #66641B

triadic

#663F1B #1B663F #3F1B66

tetradic

#663F1B #1C661B #1B4266 #641B66

square

#663F1B #1C661B #1B4266 #641B66

split-complementary

#663F1B #1B6664 #1B1C66

monochromatic

#180F06 #36210E #663F1B #965D28 #C77B35

Accessibility & contrast

On white

9.16

#663F1B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.29

#663F1B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #663F1B

9.16:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##663F1B	#FFFFFF	#000000	##FFFFFF
##663F1B	1.00	9.16	2.29	9.16
#FFFFFF	9.16	1.00	21.00	1.00
#000000	2.29	21.00	1.00	21.00
##FFFFFF	9.16	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4B4317

Deuteranopia (green-blind)

#544B1B

Tritanopia (blue-blind)

#703637

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #663f1b;
/* rgb */ color: rgb(102, 63, 27);
/* oklch */ color: oklch(40.6% 0.074 60.8);

Tailwind

colors: {
  custom: {
    50: '#957459',
    500: '#663f1b',
    950: '#000000',
  },
}

SCSS

$custom: #663f1b;
$custom-light: #957459;
$custom-dark: #000000;

JSON

{
  "hex": "#663f1b",
  "rgb": {
    "r": 102,
    "g": 63,
    "b": 27
  },
  "hsl": {
    "h": 28.8,
    "s": 58.14,
    "l": 25.294
  },
  "oklch": {
    "l": 0.40619,
    "c": 0.07397,
    "h": 60.8
  },
  "luminance": 0.06459
}

Semantic roles & 50–950 ramp

primary

#663F1B

secondary

#41709B

accent

#97E146

background

#F9F7F5

surface

#F2EDE9

border

#CCC8C5

text

#0E0803

muted

#7E7B78

Preview Lab

Preview with #663F1B

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

Preview Lab → · Contrast checker → · Palette generator →