#210101#210101

#210101 is a very dark, moderate red. Relative luminance 0.003; OKLCH L 15.9% C 0.061 H 27.8°. Best body text is #FFFFFF at 19.64:1 contrast (WCAG AA passes).

Color values

HEX	#210101
RGB	rgb(33, 1, 1)
HSL	hsl(0, 94%, 7%)
HSV	hsv(0, 97%, 13%)
CMYK	cmyk(0%, 97%, 97%, 87.1%)
CIE-LAB	lab(3.14, 12.84, 4.52)
CIE-LCH	lch(3.14, 13.62, 19.40°)
OKLab	oklab(15.88% 0.0537 0.0283)
OKLCH	oklch(15.88% 0.061 27.8)
XYZ	xyz(0.6436, 0.3473, 0.0619)
Luminance	0.0035 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#210101 #012121

analogous

#210111 #210101 #211101

triadic

#210101 #012101 #010121

tetradic

#210101 #112101 #012121 #110121

square

#210101 #112101 #012121 #110121

split-complementary

#210101 #012111 #011121

monochromatic

#1E0101 #1E0101 #210101 #5C0303 #980505

Accessibility & contrast

On white

19.64

#210101 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.07

#210101 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #210101

19.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##210101	#FFFFFF	#000000	##FFFFFF
##210101	1.00	19.64	1.07	19.64
#FFFFFF	19.64	1.00	21.00	1.00
#000000	1.07	21.00	1.00	21.00
##FFFFFF	19.64	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#080701

Deuteranopia (green-blind)

#110E00

Tritanopia (blue-blind)

#260001

Achromatopsia (no color)

#0B0B0B

Design tokens & code

CSS

--color: #210101;
/* rgb */ color: rgb(33, 1, 1);
/* oklch */ color: oklch(15.9% 0.061 27.8);

Tailwind

colors: {
  custom: {
    50: '#5c4747',
    500: '#210101',
    950: '#000000',
  },
}

SCSS

$custom: #210101;
$custom-light: #5c4747;
$custom-dark: #000000;

JSON

{
  "hex": "#210101",
  "rgb": {
    "r": 33,
    "g": 1,
    "b": 1
  },
  "hsl": {
    "h": 0,
    "s": 94.118,
    "l": 6.667
  },
  "oklch": {
    "l": 0.15875,
    "c": 0.06067,
    "h": 27.8
  },
  "luminance": 0.00347
}

Semantic roles & 50–950 ramp

primary

#210101

secondary

#156868

accent

#FFFF29

background

#F5F3F3

surface

#E9E5E5

border

#C5C1C1

text

#040000

muted

#797777

Preview Lab

Preview with #210101

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

Preview Lab → · Contrast checker → · Palette generator →