#040D2E#040D2E

#040D2E is a very dark, moderate blue. Relative luminance 0.005; OKLCH L 17.6% C 0.068 H 265.9°. Best body text is #FFFFFF at 19.05:1 contrast (WCAG AA passes).

Color values

HEX	#040D2E
RGB	rgb(4, 13, 46)
HSL	hsl(227, 84%, 10%)
HSV	hsv(227, 91%, 18%)
CMYK	cmyk(91.3%, 71.7%, 0%, 82%)
CIE-LAB	lab(4.61, 8.25, -22.39)
CIE-LCH	lch(4.61, 23.87, 290.23°)
OKLab	oklab(17.62% -0.0049 -0.0679)
OKLCH	oklch(17.62% 0.068 265.9)
XYZ	xyz(0.6870, 0.5108, 2.6466)
Luminance	0.0051 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 4.91

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040D2E #2E2504

analogous

#04222E #040D2E #10042E

triadic

#040D2E #2E040D #0D2E04

tetradic

#040D2E #2E0422 #2E2504 #042E10

square

#040D2E #2E0422 #2E2504 #042E10

split-complementary

#040D2E #2E1004 #222E04

monochromatic

#02081C #02081C #040D2E #091D66 #0E2D9F

Accessibility & contrast

On white

19.05

#040D2E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.10

#040D2E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040D2E

19.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040D2E	#FFFFFF	#000000	##FFFFFF
##040D2E	1.00	19.05	1.10	19.05
#FFFFFF	19.05	1.00	21.00	1.00
#000000	1.10	21.00	1.00	21.00
##FFFFFF	19.05	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00122F

Deuteranopia (green-blind)

#000E2D

Tritanopia (blue-blind)

#00151B

Achromatopsia (no color)

#101010

Design tokens & code

CSS

--color: #040d2e;
/* rgb */ color: rgb(4, 13, 46);
/* oklch */ color: oklch(17.6% 0.068 265.9);

Tailwind

colors: {
  custom: {
    50: '#4a4c67',
    500: '#040d2e',
    950: '#000000',
  },
}

SCSS

$custom: #040d2e;
$custom-light: #4a4c67;
$custom-dark: #000000;

JSON

{
  "hex": "#040d2e",
  "rgb": {
    "r": 4,
    "g": 13,
    "b": 46
  },
  "hsl": {
    "h": 227.143,
    "s": 84,
    "l": 9.804
  },
  "oklch": {
    "l": 0.17617,
    "c": 0.06804,
    "h": 265.9
  },
  "luminance": 0.00511
}

Semantic roles & 50–950 ramp

primary

#040D2E

secondary

#715F1D

accent

#CE2EFA

background

#F4F4F6

surface

#E7E7EB

border

#C3C3C6

text

#010106

muted

#77777A

Preview Lab

Preview with #040D2E

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

Preview Lab → · Contrast checker → · Palette generator →