#661B2B#661B2B

#661B2B is a dark, moderate red. Relative luminance 0.038; OKLCH L 34.9% C 0.107 H 12.2°. Best body text is #FFFFFF at 11.95:1 contrast (WCAG AA passes).

Color values

HEX	#661B2B
RGB	rgb(102, 27, 43)
HSL	hsl(347, 58%, 25%)
HSV	hsv(347, 74%, 40%)
CMYK	cmyk(0%, 73.5%, 57.8%, 60%)
CIE-LAB	lab(22.94, 34.58, 8.94)
CIE-LCH	lch(22.94, 35.71, 14.50°)
OKLab	oklab(34.93% 0.1045 0.0225)
OKLCH	oklch(34.93% 0.107 12.2)
XYZ	xyz(6.3080, 3.7839, 2.6832)
Luminance	0.0378 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#661B2B #1B6656

analogous

#661B50 #661B2B #66301B

triadic

#661B2B #2B661B #1B2B66

tetradic

#661B2B #50661B #1B6656 #301B66

square

#661B2B #50661B #1B6656 #301B66

split-complementary

#661B2B #1B6630 #1B5066

monochromatic

#18060A #360E17 #661B2B #96283F #C73554

Accessibility & contrast

On white

11.95

#661B2B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.76

#661B2B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #661B2B

11.95:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##661B2B	#FFFFFF	#000000	##FFFFFF
##661B2B	1.00	11.95	1.76	11.95
#FFFFFF	11.95	1.00	21.00	1.00
#000000	1.76	21.00	1.00	21.00
##FFFFFF	11.95	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2E2D2B

Deuteranopia (green-blind)

#413C29

Tritanopia (blue-blind)

#700B21

Achromatopsia (no color)

#373737

Design tokens & code

CSS

--color: #661b2b;
/* rgb */ color: rgb(102, 27, 43);
/* oklch */ color: oklch(34.9% 0.107 12.2);

Tailwind

colors: {
  custom: {
    50: '#965d64',
    500: '#661b2b',
    950: '#000000',
  },
}

SCSS

$custom: #661b2b;
$custom-light: #965d64;
$custom-dark: #000000;

JSON

{
  "hex": "#661b2b",
  "rgb": {
    "r": 102,
    "g": 27,
    "b": 43
  },
  "hsl": {
    "h": 347.2,
    "s": 58.14,
    "l": 25.294
  },
  "oklch": {
    "l": 0.34928,
    "c": 0.1069,
    "h": 12.2
  },
  "luminance": 0.03783
}

Semantic roles & 50–950 ramp

primary

#661B2B

secondary

#419B88

accent

#E1C046

background

#F9F5F5

surface

#F2E9EA

border

#CCC5C6

text

#0E0405

muted

#7E7979

Preview Lab

Preview with #661B2B

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

Preview Lab → · Contrast checker → · Palette generator →