#040B25#040B25

#040B25 is a very dark, muted blue. Relative luminance 0.004; OKLCH L 16.1% C 0.056 H 266.3°. Best body text is #FFFFFF at 19.45:1 contrast (WCAG AA passes).

Color values

HEX	#040B25
RGB	rgb(4, 11, 37)
HSL	hsl(227, 80%, 8%)
HSV	hsv(227, 89%, 15%)
CMYK	cmyk(89.2%, 70.3%, 0%, 85.5%)
CIE-LAB	lab(3.60, 5.11, -17.16)
CIE-LCH	lch(3.60, 17.90, 286.57°)
OKLab	oklab(16.15% -0.0036 -0.0554)
OKLCH	oklch(16.15% 0.056 266.3)
XYZ	xyz(0.5036, 0.3987, 1.8003)
Luminance	0.0040 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 7.56

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040B25 #251E04

analogous

#041B25 #040B25 #0D0425

triadic

#040B25 #25040B #0B2504

tetradic

#040B25 #25041B #251E04 #04250D

square

#040B25 #25041B #251E04 #04250D

split-complementary

#040B25 #250D04 #1B2504

monochromatic

#03081C #03081C #040B25 #0A1B5C #102C93

Accessibility & contrast

On white

19.45

#040B25 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.08

#040B25 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040B25

19.45:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040B25	#FFFFFF	#000000	##FFFFFF
##040B25	1.00	19.45	1.08	19.45
#FFFFFF	19.45	1.00	21.00	1.00
#000000	1.08	21.00	1.00	21.00
##FFFFFF	19.45	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#000F26

Deuteranopia (green-blind)

#000B24

Tritanopia (blue-blind)

#001116

Achromatopsia (no color)

#0D0D0D

Design tokens & code

CSS

--color: #040b25;
/* rgb */ color: rgb(4, 11, 37);
/* oklch */ color: oklch(16.1% 0.056 266.3);

Tailwind

colors: {
  custom: {
    50: '#484b5f',
    500: '#040b25',
    950: '#000000',
  },
}

SCSS

$custom: #040b25;
$custom-light: #484b5f;
$custom-dark: #000000;

JSON

{
  "hex": "#040b25",
  "rgb": {
    "r": 4,
    "g": 11,
    "b": 37
  },
  "hsl": {
    "h": 227.273,
    "s": 80.488,
    "l": 8.039
  },
  "oklch": {
    "l": 0.16145,
    "c": 0.05553,
    "h": 266.3
  },
  "luminance": 0.00399
}

Semantic roles & 50–950 ramp

primary

#040B25

secondary

#68581D

accent

#CD31F7

background

#F4F4F5

surface

#E7E7E9

border

#C3C3C5

text

#010104

muted

#777779

Preview Lab

Preview with #040B25

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

Preview Lab → · Contrast checker → · Palette generator →