#210404#210404

#210404 is a very dark, muted red. Relative luminance 0.004; OKLCH L 16.8% C 0.052 H 24.8°. Best body text is #FFFFFF at 19.38:1 contrast (WCAG AA passes).

Color values

HEX	#210404
RGB	rgb(33, 4, 4)
HSL	hsl(0, 78%, 7%)
HSV	hsv(0, 88%, 13%)
CMYK	cmyk(0%, 87.9%, 87.9%, 87.1%)
CIE-LAB	lab(3.78, 12.06, 4.25)
CIE-LCH	lch(3.78, 12.78, 19.40°)
OKLab	oklab(16.75% 0.0476 0.022)
OKLCH	oklch(16.75% 0.052 24.8)
XYZ	xyz(0.6926, 0.4190, 0.1593)
Luminance	0.0042 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#210404 #042121

analogous

#210413 #210404 #211304

triadic

#210404 #042104 #040421

tetradic

#210404 #132104 #042121 #130421

square

#210404 #132104 #042121 #130421

split-complementary

#210404 #042113 #041321

monochromatic

#1B0303 #1B0303 #210404 #580B0B #8E1111

Accessibility & contrast

On white

19.38

#210404 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.08

#210404 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #210404

19.38:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##210404	#FFFFFF	#000000	##FFFFFF
##210404	1.00	19.38	1.08	19.38
#FFFFFF	19.38	1.00	21.00	1.00
#000000	1.08	21.00	1.00	21.00
##FFFFFF	19.38	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0B0904

Deuteranopia (green-blind)

#131003

Tritanopia (blue-blind)

#250004

Achromatopsia (no color)

#0D0D0D

Design tokens & code

CSS

--color: #210404;
/* rgb */ color: rgb(33, 4, 4);
/* oklch */ color: oklch(16.8% 0.052 24.8);

Tailwind

colors: {
  custom: {
    50: '#5c4848',
    500: '#210404',
    950: '#000000',
  },
}

SCSS

$custom: #210404;
$custom-light: #5c4848;
$custom-dark: #000000;

JSON

{
  "hex": "#210404",
  "rgb": {
    "r": 33,
    "g": 4,
    "b": 4
  },
  "hsl": {
    "h": 0,
    "s": 78.378,
    "l": 7.255
  },
  "oklch": {
    "l": 0.16751,
    "c": 0.05246,
    "h": 24.8
  },
  "luminance": 0.00419
}

Semantic roles & 50–950 ramp

primary

#210404

secondary

#1D6464

accent

#F5F533

background

#F5F4F4

surface

#E9E6E6

border

#C5C2C2

text

#040000

muted

#797777

Preview Lab

Preview with #210404

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

Preview Lab → · Contrast checker → · Palette generator →