#040637#040637

#040637 is a very dark, moderate blue. Relative luminance 0.004; OKLCH L 17.2% C 0.093 H 269.1°. Best body text is #FFFFFF at 19.33:1 contrast (WCAG AA passes).

Color values

HEX	#040637
RGB	rgb(4, 6, 55)
HSL	hsl(238, 86%, 12%)
HSV	hsv(238, 93%, 22%)
CMYK	cmyk(92.7%, 89.1%, 0%, 78.4%)
CIE-LAB	lab(3.90, 16.14, -30.20)
CIE-LCH	lch(3.90, 34.25, 298.12°)
OKLab	oklab(17.15% -0.0014 -0.0925)
OKLCH	oklch(17.15% 0.093 269.1)
XYZ	xyz(0.8045, 0.4318, 3.6546)
Luminance	0.0043 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040637 #373504

analogous

#042037 #040637 #1C0437

triadic

#040637 #370406 #063704

tetradic

#040637 #370420 #373504 #04371C

square

#040637 #370420 #373504 #04371C

split-complementary

#040637 #371C04 #203704

monochromatic

#02031D #02031D #040637 #080C70 #0C12A9

Accessibility & contrast

On white

19.33

#040637 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.09

#040637 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040637

19.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040637	#FFFFFF	#000000	##FFFFFF
##040637	1.00	19.33	1.09	19.33
#FFFFFF	19.33	1.00	21.00	1.00
#000000	1.09	21.00	1.00	21.00
##FFFFFF	19.33	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001038

Deuteranopia (green-blind)

#000B36

Tritanopia (blue-blind)

#00141E

Achromatopsia (no color)

#0E0E0E

Design tokens & code

CSS

--color: #040637;
/* rgb */ color: rgb(4, 6, 55);
/* oklch */ color: oklch(17.2% 0.093 269.1);

Tailwind

colors: {
  custom: {
    50: '#4d496e',
    500: '#040637',
    950: '#000000',
  },
}

SCSS

$custom: #040637;
$custom-light: #4d496e;
$custom-dark: #000000;

JSON

{
  "hex": "#040637",
  "rgb": {
    "r": 4,
    "g": 6,
    "b": 55
  },
  "hsl": {
    "h": 237.647,
    "s": 86.441,
    "l": 11.569
  },
  "oklch": {
    "l": 0.17152,
    "c": 0.09256,
    "h": 269.1
  },
  "luminance": 0.00432
}

Semantic roles & 50–950 ramp

primary

#040637

secondary

#79751E

accent

#F42BFD

background

#F4F4F6

surface

#E7E6EC

border

#C3C2C7

text

#020007

muted

#78777A

Preview Lab

Preview with #040637

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

Preview Lab → · Contrast checker → · Palette generator →