#040231#040231

#040231 is a very dark, moderate blue. Relative luminance 0.003; OKLCH L 15.3% C 0.091 H 271.3°. Best body text is #FFFFFF at 19.85:1 contrast (WCAG AA passes).

Color values

HEX	#040231
RGB	rgb(4, 2, 49)
HSL	hsl(243, 92%, 10%)
HSV	hsv(243, 96%, 19%)
CMYK	cmyk(91.8%, 95.9%, 0%, 80.8%)
CIE-LAB	lab(2.63, 14.32, -27.80)
CIE-LCH	lch(2.63, 31.27, 297.24°)
OKLab	oklab(15.28% 0.0021 -0.0907)
OKLCH	oklch(15.28% 0.091 271.3)
XYZ	xyz(0.6260, 0.2909, 2.9283)
Luminance	0.0029 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040231 #2F3102

analogous

#021831 #040231 #1B0231

triadic

#040231 #310402 #023104

tetradic

#040231 #310218 #2F3102 #02311B

square

#040231 #310218 #2F3102 #02311B

split-complementary

#040231 #311B02 #183102

monochromatic

#02011D #02011D #040231 #09046C #0E07A7

Accessibility & contrast

On white

19.85

#040231 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.06

#040231 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040231

19.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040231	#FFFFFF	#000000	##FFFFFF
##040231	1.00	19.85	1.06	19.85
#FFFFFF	19.85	1.00	21.00	1.00
#000000	1.06	21.00	1.00	21.00
##FFFFFF	19.85	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#000C32

Deuteranopia (green-blind)

#000730

Tritanopia (blue-blind)

#001019

Achromatopsia (no color)

#0A0A0A

Design tokens & code

CSS

--color: #040231;
/* rgb */ color: rgb(4, 2, 49);
/* oklch */ color: oklch(15.3% 0.091 271.3);

Tailwind

colors: {
  custom: {
    50: '#4a4769',
    500: '#040231',
    950: '#000000',
  },
}

SCSS

$custom: #040231;
$custom-light: #4a4769;
$custom-dark: #000000;

JSON

{
  "hex": "#040231",
  "rgb": {
    "r": 4,
    "g": 2,
    "b": 49
  },
  "hsl": {
    "h": 242.553,
    "s": 92.157,
    "l": 10
  },
  "oklch": {
    "l": 0.15276,
    "c": 0.09075,
    "h": 271.3
  },
  "luminance": 0.00291
}

Semantic roles & 50–950 ramp

primary

#040231

secondary

#727519

accent

#FF29F6

background

#F4F3F6

surface

#E7E5EB

border

#C3C1C6

text

#010006

muted

#77777A

Preview Lab

Preview with #040231

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

Preview Lab → · Contrast checker → · Palette generator →