#040A2D#040A2D

#040A2D is a very dark, moderate blue. Relative luminance 0.004; OKLCH L 16.8% C 0.071 H 268.0°. Best body text is #FFFFFF at 19.33:1 contrast (WCAG AA passes).

Color values

HEX	#040A2D
RGB	rgb(4, 10, 45)
HSL	hsl(231, 84%, 10%)
HSV	hsv(231, 91%, 18%)
CMYK	cmyk(91.1%, 77.8%, 0%, 82.4%)
CIE-LAB	lab(3.90, 9.06, -22.77)
CIE-LCH	lch(3.90, 24.51, 291.70°)
OKLab	oklab(16.78% -0.0025 -0.0709)
OKLCH	oklch(16.78% 0.071 268)
XYZ	xyz(0.6321, 0.4323, 2.5322)
Luminance	0.0043 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 4.46

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040A2D #2D2704

analogous

#041F2D #040A2D #13042D

triadic

#040A2D #2D040A #0A2D04

tetradic

#040A2D #2D041F #2D2704 #042D13

square

#040A2D #2D041F #2D2704 #042D13

split-complementary

#040A2D #2D1304 #1F2D04

monochromatic

#02061C #02061C #040A2D #091665 #0E239D

Accessibility & contrast

On white

19.33

#040A2D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.09

#040A2D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040A2D

19.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040A2D	#FFFFFF	#000000	##FFFFFF
##040A2D	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)

#00102E

Deuteranopia (green-blind)

#000C2C

Tritanopia (blue-blind)

#00131A

Achromatopsia (no color)

#0E0E0E

Design tokens & code

CSS

--color: #040a2d;
/* rgb */ color: rgb(4, 10, 45);
/* oklch */ color: oklch(16.8% 0.071 268.0);

Tailwind

colors: {
  custom: {
    50: '#4a4b66',
    500: '#040a2d',
    950: '#000000',
  },
}

SCSS

$custom: #040a2d;
$custom-light: #4a4b66;
$custom-dark: #000000;

JSON

{
  "hex": "#040a2d",
  "rgb": {
    "r": 4,
    "g": 10,
    "b": 45
  },
  "hsl": {
    "h": 231.22,
    "s": 83.673,
    "l": 9.608
  },
  "oklch": {
    "l": 0.16781,
    "c": 0.07094,
    "h": 268
  },
  "luminance": 0.00432
}

Semantic roles & 50–950 ramp

primary

#040A2D

secondary

#70641D

accent

#DC2EFA

background

#F4F4F6

surface

#E7E7EB

border

#C3C3C6

text

#010106

muted

#77777A

Preview Lab

Preview with #040A2D

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

Preview Lab → · Contrast checker → · Palette generator →