#040837#040837

#040837 is a very dark, moderate blue. Relative luminance 0.005; OKLCH L 17.6% C 0.090 H 268.5°. Best body text is #FFFFFF at 19.18:1 contrast (WCAG AA passes).

Color values

HEX	#040837
RGB	rgb(4, 8, 55)
HSL	hsl(235, 86%, 12%)
HSV	hsv(235, 93%, 22%)
CMYK	cmyk(92.7%, 85.5%, 0%, 78.4%)
CIE-LAB	lab(4.29, 15.35, -29.57)
CIE-LCH	lch(4.29, 33.32, 297.43°)
OKLab	oklab(17.59% -0.0023 -0.0896)
OKLCH	oklch(17.59% 0.09 268.5)
XYZ	xyz(0.8263, 0.4752, 3.6619)
Luminance	0.0047 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040837 #373304

analogous

#042237 #040837 #1A0437

triadic

#040837 #370408 #083704

tetradic

#040837 #370422 #373304 #04371A

square

#040837 #370422 #373304 #04371A

split-complementary

#040837 #371A04 #223704

monochromatic

#02041D #02041D #040837 #081070 #0C19A9

Accessibility & contrast

On white

19.18

#040837 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.10

#040837 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040837

19.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040837	#FFFFFF	#000000	##FFFFFF
##040837	1.00	19.18	1.10	19.18
#FFFFFF	19.18	1.00	21.00	1.00
#000000	1.10	21.00	1.00	21.00
##FFFFFF	19.18	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001238

Deuteranopia (green-blind)

#000C36

Tritanopia (blue-blind)

#00161E

Achromatopsia (no color)

#0F0F0F

Design tokens & code

CSS

--color: #040837;
/* rgb */ color: rgb(4, 8, 55);
/* oklch */ color: oklch(17.6% 0.090 268.5);

Tailwind

colors: {
  custom: {
    50: '#4d496e',
    500: '#040837',
    950: '#000000',
  },
}

SCSS

$custom: #040837;
$custom-light: #4d496e;
$custom-dark: #000000;

JSON

{
  "hex": "#040837",
  "rgb": {
    "r": 4,
    "g": 8,
    "b": 55
  },
  "hsl": {
    "h": 235.294,
    "s": 86.441,
    "l": 11.569
  },
  "oklch": {
    "l": 0.17588,
    "c": 0.08967,
    "h": 268.5
  },
  "luminance": 0.00475
}

Semantic roles & 50–950 ramp

primary

#040837

secondary

#79721E

accent

#EC2BFD

background

#F4F4F6

surface

#E7E7EC

border

#C3C3C7

text

#020107

muted

#78777A

Preview Lab

Preview with #040837

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

Preview Lab → · Contrast checker → · Palette generator →