#42100F#42100F

#42100F is a dark, moderate red. Relative luminance 0.016; OKLCH L 25.9% C 0.078 H 25.3°. Best body text is #FFFFFF at 16.00:1 contrast (WCAG AA passes).

Color values

HEX	#42100F
RGB	rgb(66, 16, 15)
HSL	hsl(1, 63%, 16%)
HSV	hsv(1, 77%, 26%)
CMYK	cmyk(0%, 75.8%, 77.3%, 74.1%)
CIE-LAB	lab(13.01, 24.03, 13.54)
CIE-LCH	lch(13.01, 27.59, 29.41°)
OKLab	oklab(25.93% 0.0701 0.0332)
OKLCH	oklch(25.93% 0.078 25.3)
XYZ	xyz(2.5185, 1.5637, 0.6210)
Luminance	0.0156 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42100F #0F4142

analogous

#420F27 #42100F #42290F

triadic

#42100F #0F4210 #100F42

tetradic

#42100F #27420F #0F4142 #290F42

square

#42100F #27420F #0F4142 #290F42

split-complementary

#42100F #0F4229 #0F2742

monochromatic

#190606 #190606 #42100F #741C1A #A62826

Accessibility & contrast

On white

16.00

#42100F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.31

#42100F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #42100F

16.00:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42100F	#FFFFFF	#000000	##FFFFFF
##42100F	1.00	16.00	1.31	16.00
#FFFFFF	16.00	1.00	21.00	1.00
#000000	1.31	21.00	1.00	21.00
##FFFFFF	16.00	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1E1B0E

Deuteranopia (green-blind)

#2A260E

Tritanopia (blue-blind)

#490410

Achromatopsia (no color)

#222222

Design tokens & code

CSS

--color: #42100f;
/* rgb */ color: rgb(66, 16, 15);
/* oklch */ color: oklch(25.9% 0.078 25.3);

Tailwind

colors: {
  custom: {
    50: '#7b524d',
    500: '#42100f',
    950: '#000000',
  },
}

SCSS

$custom: #42100f;
$custom-light: #7b524d;
$custom-dark: #000000;

JSON

{
  "hex": "#42100f",
  "rgb": {
    "r": 66,
    "g": 16,
    "b": 15
  },
  "hsl": {
    "h": 1.176,
    "s": 62.963,
    "l": 15.882
  },
  "oklch": {
    "l": 0.25931,
    "c": 0.0776,
    "h": 25.3
  },
  "luminance": 0.01563
}

Semantic roles & 50–950 ramp

primary

#42100F

secondary

#307B7C

accent

#E3E642

background

#F7F4F4

surface

#EEE7E7

border

#C9C3C3

text

#0A0201

muted

#7C7877

Preview Lab

Preview with #42100F

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

Preview Lab → · Contrast checker → · Palette generator →