#040737#040737

#040737 is a very dark, moderate blue. Relative luminance 0.005; OKLCH L 17.4% C 0.091 H 268.8°. Best body text is #FFFFFF at 19.25:1 contrast (WCAG AA passes).

Color values

HEX	#040737
RGB	rgb(4, 7, 55)
HSL	hsl(236, 86%, 12%)
HSV	hsv(236, 93%, 22%)
CMYK	cmyk(92.7%, 87.3%, 0%, 78.4%)
CIE-LAB	lab(4.10, 15.74, -29.89)
CIE-LCH	lch(4.10, 33.78, 297.78°)
OKLab	oklab(17.37% -0.0018 -0.0911)
OKLCH	oklch(17.37% 0.091 268.8)
XYZ	xyz(0.8154, 0.4535, 3.6582)
Luminance	0.0045 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Dark Navy

#000435

ΔE00 0.98

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040737 #373404

analogous

#042137 #040737 #1B0437

triadic

#040737 #370407 #073704

tetradic

#040737 #370421 #373404 #04371B

square

#040737 #370421 #373404 #04371B

split-complementary

#040737 #371B04 #213704

monochromatic

#02041D #02041D #040737 #080E70 #0C16A9

Accessibility & contrast

On white

19.25

#040737 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.09

#040737 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040737

19.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040737	#FFFFFF	#000000	##FFFFFF
##040737	1.00	19.25	1.09	19.25
#FFFFFF	19.25	1.00	21.00	1.00
#000000	1.09	21.00	1.00	21.00
##FFFFFF	19.25	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001138

Deuteranopia (green-blind)

#000C36

Tritanopia (blue-blind)

#00151E

Achromatopsia (no color)

#0E0E0E

Design tokens & code

CSS

--color: #040737;
/* rgb */ color: rgb(4, 7, 55);
/* oklch */ color: oklch(17.4% 0.091 268.8);

Tailwind

colors: {
  custom: {
    50: '#4d496e',
    500: '#040737',
    950: '#000000',
  },
}

SCSS

$custom: #040737;
$custom-light: #4d496e;
$custom-dark: #000000;

JSON

{
  "hex": "#040737",
  "rgb": {
    "r": 4,
    "g": 7,
    "b": 55
  },
  "hsl": {
    "h": 236.471,
    "s": 86.441,
    "l": 11.569
  },
  "oklch": {
    "l": 0.17373,
    "c": 0.0911,
    "h": 268.8
  },
  "luminance": 0.00454
}

Semantic roles & 50–950 ramp

primary

#040737

secondary

#79741E

accent

#F02BFD

background

#F4F4F6

surface

#E7E6EC

border

#C3C2C7

text

#020007

muted

#78777A

Preview Lab

Preview with #040737

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

Preview Lab → · Contrast checker → · Palette generator →