#661B23#661B23

#661B23 is a dark, moderate red. Relative luminance 0.037; OKLCH L 34.7% C 0.107 H 18.8°. Best body text is #FFFFFF at 12.03:1 contrast (WCAG AA passes).

Color values

HEX	#661B23
RGB	rgb(102, 27, 35)
HSL	hsl(354, 58%, 25%)
HSV	hsv(354, 74%, 40%)
CMYK	cmyk(0%, 73.5%, 65.7%, 60%)
CIE-LAB	lab(22.76, 33.93, 14.19)
CIE-LCH	lch(22.76, 36.78, 22.70°)
OKLab	oklab(34.73% 0.101 0.0343)
OKLCH	oklch(34.73% 0.107 18.8)
XYZ	xyz(6.1754, 3.7309, 1.9847)
Luminance	0.0373 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#661B23 #1B665E

analogous

#661B48 #661B23 #66381B

triadic

#661B23 #23661B #1B2366

tetradic

#661B23 #48661B #1B665E #381B66

square

#661B23 #48661B #1B665E #381B66

split-complementary

#661B23 #1B6638 #1B4866

monochromatic

#180608 #360E12 #661B23 #962834 #C73544

Accessibility & contrast

On white

12.03

#661B23 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.75

#661B23 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #661B23

12.03:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##661B23	#FFFFFF	#000000	##FFFFFF
##661B23	1.00	12.03	1.75	12.03
#FFFFFF	12.03	1.00	21.00	1.00
#000000	1.75	21.00	1.00	21.00
##FFFFFF	12.03	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2F2C23

Deuteranopia (green-blind)

#423C21

Tritanopia (blue-blind)

#70071E

Achromatopsia (no color)

#363636

Design tokens & code

CSS

--color: #661b23;
/* rgb */ color: rgb(102, 27, 35);
/* oklch */ color: oklch(34.7% 0.107 18.8);

Tailwind

colors: {
  custom: {
    50: '#975d5d',
    500: '#661b23',
    950: '#000000',
  },
}

SCSS

$custom: #661b23;
$custom-light: #975d5d;
$custom-dark: #000000;

JSON

{
  "hex": "#661b23",
  "rgb": {
    "r": 102,
    "g": 27,
    "b": 35
  },
  "hsl": {
    "h": 353.6,
    "s": 58.14,
    "l": 25.294
  },
  "oklch": {
    "l": 0.34733,
    "c": 0.10664,
    "h": 18.8
  },
  "luminance": 0.0373
}

Semantic roles & 50–950 ramp

primary

#661B23

secondary

#419B92

accent

#E1D146

background

#F9F5F5

surface

#F2E9E9

border

#CCC5C5

text

#0E0404

muted

#7E7979

Preview Lab

Preview with #661B23

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

Preview Lab → · Contrast checker → · Palette generator →