#101021#101021

#101021 is a very dark, muted blue. Relative luminance 0.006; OKLCH L 18.3% C 0.034 H 282.5°. Best body text is #FFFFFF at 18.78:1 contrast (WCAG AA passes).

Color values

HEX	#101021
RGB	rgb(16, 16, 33)
HSL	hsl(240, 35%, 10%)
HSV	hsv(240, 52%, 13%)
CMYK	cmyk(51.5%, 51.5%, 0%, 87.1%)
CIE-LAB	lab(5.33, 4.59, -11.34)
CIE-LCH	lch(5.33, 12.24, 292.05°)
OKLab	oklab(18.29% 0.0074 -0.0336)
OKLCH	oklch(18.29% 0.034 282.5)
XYZ	xyz(0.6734, 0.5905, 1.5170)
Luminance	0.0059 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#101021 #212110

analogous

#101921 #101021 #191021

triadic

#101021 #211010 #102110

tetradic

#101021 #211019 #212110 #102119

square

#101021 #211019 #212110 #102119

split-complementary

#101021 #211910 #192110

monochromatic

#0A0A15 #0A0A15 #101021 #24244A #383873

Accessibility & contrast

On white

18.78

#101021 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.12

#101021 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #101021

18.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##101021	#FFFFFF	#000000	##FFFFFF
##101021	1.00	18.78	1.12	18.78
#FFFFFF	18.78	1.00	21.00	1.00
#000000	1.12	21.00	1.00	21.00
##FFFFFF	18.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0A1222

Deuteranopia (green-blind)

#0A1121

Tritanopia (blue-blind)

#0B1316

Achromatopsia (no color)

#121212

Design tokens & code

CSS

--color: #101021;
/* rgb */ color: rgb(16, 16, 33);
/* oklch */ color: oklch(18.3% 0.034 282.5);

Tailwind

colors: {
  custom: {
    50: '#4e4e5c',
    500: '#101021',
    950: '#000000',
  },
}

SCSS

$custom: #101021;
$custom-light: #4e4e5c;
$custom-dark: #000000;

JSON

{
  "hex": "#101021",
  "rgb": {
    "r": 16,
    "g": 16,
    "b": 33
  },
  "hsl": {
    "h": 240,
    "s": 34.694,
    "l": 9.608
  },
  "oklch": {
    "l": 0.18292,
    "c": 0.03445,
    "h": 282.5
  },
  "luminance": 0.00591
}

Semantic roles & 50–950 ramp

primary

#101021

secondary

#575735

accent

#CB5DCB

background

#F4F4F5

surface

#E7E7E9

border

#C3C3C5

text

#010104

muted

#777779

Preview Lab

Preview with #101021

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

Preview Lab → · Contrast checker → · Palette generator →