#66231B#66231B

#66231B is a dark, moderate red. Relative luminance 0.041; OKLCH L 35.6% C 0.098 H 29.6°. Best body text is #FFFFFF at 11.53:1 contrast (WCAG AA passes).

Color values

HEX	#66231B
RGB	rgb(102, 35, 27)
HSL	hsl(6, 58%, 25%)
HSV	hsv(6, 74%, 40%)
CMYK	cmyk(0%, 65.7%, 73.5%, 60%)
CIE-LAB	lab(24.02, 29.62, 21.07)
CIE-LCH	lch(24.02, 36.35, 35.43°)
OKLab	oklab(35.63% 0.0856 0.0486)
OKLCH	oklch(35.63% 0.098 29.6)
XYZ	xyz(6.2790, 4.1068, 1.4988)
Luminance	0.0411 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66231B #1B5E66

analogous

#661B38 #66231B #66481B

triadic

#66231B #1B6623 #231B66

tetradic

#66231B #38661B #1B5E66 #481B66

square

#66231B #38661B #1B5E66 #481B66

split-complementary

#66231B #1B6648 #1B3866

monochromatic

#180806 #36120E #66231B #963428 #C74435

Accessibility & contrast

On white

11.53

#66231B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.82

#66231B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #66231B

11.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66231B	#FFFFFF	#000000	##FFFFFF
##66231B	1.00	11.53	1.82	11.53
#FFFFFF	11.53	1.00	21.00	1.00
#000000	1.82	21.00	1.00	21.00
##FFFFFF	11.53	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#35301A

Deuteranopia (green-blind)

#463F19

Tritanopia (blue-blind)

#701421

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #66231b;
/* rgb */ color: rgb(102, 35, 27);
/* oklch */ color: oklch(35.6% 0.098 29.6);

Tailwind

colors: {
  custom: {
    50: '#976157',
    500: '#66231b',
    950: '#000000',
  },
}

SCSS

$custom: #66231b;
$custom-light: #976157;
$custom-dark: #000000;

JSON

{
  "hex": "#66231b",
  "rgb": {
    "r": 102,
    "g": 35,
    "b": 27
  },
  "hsl": {
    "h": 6.4,
    "s": 58.14,
    "l": 25.294
  },
  "oklch": {
    "l": 0.35632,
    "c": 0.09841,
    "h": 29.6
  },
  "luminance": 0.04106
}

Semantic roles & 50–950 ramp

primary

#66231B

secondary

#41929B

accent

#D1E146

background

#F9F5F5

surface

#F2EAE9

border

#CCC6C5

text

#0F0503

muted

#7E7978

Preview Lab

Preview with #66231B

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

Preview Lab → · Contrast checker → · Palette generator →