#040839#040839

#040839 is a very dark, moderate blue. Relative luminance 0.005; OKLCH L 17.9% C 0.093 H 268.4°. Best body text is #FFFFFF at 19.11:1 contrast (WCAG AA passes).

Color values

HEX	#040839
RGB	rgb(4, 8, 57)
HSL	hsl(235, 87%, 12%)
HSV	hsv(235, 93%, 22%)
CMYK	cmyk(93%, 86%, 0%, 77.6%)
CIE-LAB	lab(4.47, 16.57, -30.74)
CIE-LCH	lch(4.47, 34.93, 298.32°)
OKLab	oklab(17.85% -0.0026 -0.0926)
OKLCH	oklch(17.85% 0.093 268.4)
XYZ	xyz(0.8752, 0.4948, 3.9195)
Luminance	0.0050 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040839 #393504

analogous

#042339 #040839 #1B0439

triadic

#040839 #390408 #083904

tetradic

#040839 #390423 #393504 #04391B

square

#040839 #390423 #393504 #04391B

split-complementary

#040839 #391B04 #233904

monochromatic

#02041D #02041D #040839 #081072 #0C18AB

Accessibility & contrast

On white

19.11

#040839 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.10

#040839 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040839

19.11:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040839	#FFFFFF	#000000	##FFFFFF
##040839	1.00	19.11	1.10	19.11
#FFFFFF	19.11	1.00	21.00	1.00
#000000	1.10	21.00	1.00	21.00
##FFFFFF	19.11	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00123A

Deuteranopia (green-blind)

#000D38

Tritanopia (blue-blind)

#001620

Achromatopsia (no color)

#0F0F0F

Design tokens & code

CSS

--color: #040839;
/* rgb */ color: rgb(4, 8, 57);
/* oklch */ color: oklch(17.9% 0.093 268.4);

Tailwind

colors: {
  custom: {
    50: '#4e4970',
    500: '#040839',
    950: '#000000',
  },
}

SCSS

$custom: #040839;
$custom-light: #4e4970;
$custom-dark: #000000;

JSON

{
  "hex": "#040839",
  "rgb": {
    "r": 4,
    "g": 8,
    "b": 57
  },
  "hsl": {
    "h": 235.472,
    "s": 86.885,
    "l": 11.961
  },
  "oklch": {
    "l": 0.17854,
    "c": 0.09265,
    "h": 268.4
  },
  "luminance": 0.00495
}

Semantic roles & 50–950 ramp

primary

#040839

secondary

#7B741E

accent

#ED2BFD

background

#F4F4F6

surface

#E7E6EC

border

#C3C2C7

text

#020107

muted

#78777A

Preview Lab

Preview with #040839

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

Preview Lab → · Contrast checker → · Palette generator →