#64101B#64101B

#64101B is a dark, moderate red. Relative luminance 0.032; OKLCH L 33.1% C 0.116 H 19.9°. Best body text is #FFFFFF at 12.87:1 contrast (WCAG AA passes).

Color values

HEX	#64101B
RGB	rgb(100, 16, 27)
HSL	hsl(352, 72%, 23%)
HSV	hsv(352, 84%, 39%)
CMYK	cmyk(0%, 84%, 73%, 60.8%)
CIE-LAB	lab(20.67, 36.94, 16.94)
CIE-LCH	lch(20.67, 40.64, 24.64°)
OKLab	oklab(33.06% 0.109 0.0396)
OKLCH	oklch(33.06% 0.116 19.9)
XYZ	xyz(5.6393, 3.1599, 1.3497)
Luminance	0.0316 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#64101B #106459

analogous

#641045 #64101B #642F10

triadic

#64101B #1B6410 #101B64

tetradic

#64101B #456410 #106459 #2F1064

square

#64101B #456410 #106459 #2F1064

split-complementary

#64101B #10642F #104564

monochromatic

#1A0407 #2F080D #64101B #991829 #CE2137

Accessibility & contrast

On white

12.87

#64101B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.63

#64101B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #64101B

12.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##64101B	#FFFFFF	#000000	##FFFFFF
##64101B	1.00	12.87	1.63	12.87
#FFFFFF	12.87	1.00	21.00	1.00
#000000	1.63	21.00	1.00	21.00
##FFFFFF	12.87	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#29261B

Deuteranopia (green-blind)

#3E3818

Tritanopia (blue-blind)

#6F0015

Achromatopsia (no color)

#323232

Design tokens & code

CSS

--color: #64101b;
/* rgb */ color: rgb(100, 16, 27);
/* oklch */ color: oklch(33.1% 0.116 19.9);

Tailwind

colors: {
  custom: {
    50: '#975857',
    500: '#64101b',
    950: '#000000',
  },
}

SCSS

$custom: #64101b;
$custom-light: #975857;
$custom-dark: #000000;

JSON

{
  "hex": "#64101b",
  "rgb": {
    "r": 100,
    "g": 16,
    "b": 27
  },
  "hsl": {
    "h": 352.143,
    "s": 72.414,
    "l": 22.745
  },
  "oklch": {
    "l": 0.33055,
    "c": 0.11599,
    "h": 19.9
  },
  "luminance": 0.03159
}

Semantic roles & 50–950 ramp

primary

#64101B

secondary

#339D8F

accent

#EFD739

background

#F9F5F5

surface

#F2E9E9

border

#CCC5C5

text

#0F0403

muted

#7E7978

Preview Lab

Preview with #64101B

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

Preview Lab → · Contrast checker → · Palette generator →