#040221#040221

#040221 is a very dark, moderate blue. Relative luminance 0.002; OKLCH L 12.9% C 0.067 H 276.5°. Best body text is #FFFFFF at 20.27:1 contrast (WCAG AA passes).

Color values

HEX	#040221
RGB	rgb(4, 2, 33)
HSL	hsl(244, 89%, 7%)
HSV	hsv(244, 94%, 13%)
CMYK	cmyk(87.9%, 93.9%, 0%, 87.1%)
CIE-LAB	lab(1.62, 7.21, -17.09)
CIE-LCH	lch(1.62, 18.55, 292.89°)
OKLab	oklab(12.86% 0.0076 -0.067)
OKLCH	oklch(12.86% 0.067 276.5)
XYZ	xyz(0.3462, 0.1790, 1.4549)
Luminance	0.0018 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 7.28

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040221 #1F2102

analogous

#021021 #040221 #140221

triadic

#040221 #210402 #022104

tetradic

#040221 #210210 #1F2102 #022114

square

#040221 #210210 #1F2102 #022114

split-complementary

#040221 #211402 #102102

monochromatic

#03021D #03021D #040221 #0B055B #120994

Accessibility & contrast

On white

20.27

#040221 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.04

#040221 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040221

20.27:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040221	#FFFFFF	#000000	##FFFFFF
##040221	1.00	20.27	1.04	20.27
#FFFFFF	20.27	1.00	21.00	1.00
#000000	1.04	21.00	1.00	21.00
##FFFFFF	20.27	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#000722

Deuteranopia (green-blind)

#000520

Tritanopia (blue-blind)

#000910

Achromatopsia (no color)

#060606

Design tokens & code

CSS

--color: #040221;
/* rgb */ color: rgb(4, 2, 33);
/* oklch */ color: oklch(12.9% 0.067 276.5);

Tailwind

colors: {
  custom: {
    50: '#48475c',
    500: '#040221',
    950: '#000000',
  },
}

SCSS

$custom: #040221;
$custom-light: #48475c;
$custom-dark: #000000;

JSON

{
  "hex": "#040221",
  "rgb": {
    "r": 4,
    "g": 2,
    "b": 33
  },
  "hsl": {
    "h": 243.871,
    "s": 88.571,
    "l": 6.863
  },
  "oklch": {
    "l": 0.1286,
    "c": 0.06741,
    "h": 276.5
  },
  "luminance": 0.00179
}

Semantic roles & 50–950 ramp

primary

#040221

secondary

#626718

accent

#FF29F1

background

#F4F4F5

surface

#E6E6E9

border

#C2C2C5

text

#000004

muted

#777779

Preview Lab

Preview with #040221

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

Preview Lab → · Contrast checker → · Palette generator →