#040437#040437

#040437 is a very dark, moderate blue. Relative luminance 0.004; OKLCH L 16.7% C 0.096 H 269.7°. Best body text is #FFFFFF at 19.49:1 contrast (WCAG AA passes).

Color values

HEX	#040437
RGB	rgb(4, 4, 55)
HSL	hsl(240, 86%, 12%)
HSV	hsv(240, 93%, 22%)
CMYK	cmyk(92.7%, 92.7%, 0%, 78.4%)
CIE-LAB	lab(3.51, 16.94, -30.84)
CIE-LCH	lch(3.51, 35.19, 298.79°)
OKLab	oklab(16.69% -0.0005 -0.0956)
OKLCH	oklch(16.69% 0.096 269.7)
XYZ	xyz(0.7828, 0.3884, 3.6474)
Luminance	0.0039 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040437 #373704

analogous

#041E37 #040437 #1E0437

triadic

#040437 #370404 #043704

tetradic

#040437 #37041E #373704 #04371E

square

#040437 #37041E #373704 #04371E

split-complementary

#040437 #371E04 #1E3704

monochromatic

#02021D #02021D #040437 #080870 #0C0CA9

Accessibility & contrast

On white

19.49

#040437 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.08

#040437 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040437

19.49:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040437	#FFFFFF	#000000	##FFFFFF
##040437	1.00	19.49	1.08	19.49
#FFFFFF	19.49	1.00	21.00	1.00
#000000	1.08	21.00	1.00	21.00
##FFFFFF	19.49	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#000F38

Deuteranopia (green-blind)

#000A36

Tritanopia (blue-blind)

#00131D

Achromatopsia (no color)

#0D0D0D

Design tokens & code

CSS

--color: #040437;
/* rgb */ color: rgb(4, 4, 55);
/* oklch */ color: oklch(16.7% 0.096 269.7);

Tailwind

colors: {
  custom: {
    50: '#4d486e',
    500: '#040437',
    950: '#000000',
  },
}

SCSS

$custom: #040437;
$custom-light: #4d486e;
$custom-dark: #000000;

JSON

{
  "hex": "#040437",
  "rgb": {
    "r": 4,
    "g": 4,
    "b": 55
  },
  "hsl": {
    "h": 240,
    "s": 86.441,
    "l": 11.569
  },
  "oklch": {
    "l": 0.16694,
    "c": 0.09564,
    "h": 269.7
  },
  "luminance": 0.00388
}

Semantic roles & 50–950 ramp

primary

#040437

secondary

#79791E

accent

#FD2BFD

background

#F4F4F6

surface

#E7E6EC

border

#C3C2C7

text

#020007

muted

#78777A

Preview Lab

Preview with #040437

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

Preview Lab → · Contrast checker → · Palette generator →