#040E2F#040E2F

#040E2F is a very dark, moderate blue. Relative luminance 0.005; OKLCH L 18.0% C 0.068 H 265.2°. Best body text is #FFFFFF at 18.94:1 contrast (WCAG AA passes).

Color values

HEX	#040E2F
RGB	rgb(4, 14, 47)
HSL	hsl(226, 84%, 10%)
HSV	hsv(226, 91%, 18%)
CMYK	cmyk(91.5%, 70.2%, 0%, 81.6%)
CIE-LAB	lab(4.92, 8.27, -22.65)
CIE-LCH	lch(4.92, 24.11, 290.07°)
OKLab	oklab(17.97% -0.0057 -0.0679)
OKLCH	oklch(17.97% 0.068 265.2)
XYZ	xyz(0.7200, 0.5450, 2.7560)
Luminance	0.0054 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 4.89

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040E2F #2F2504

analogous

#04232F #040E2F #10042F

triadic

#040E2F #2F040E #0E2F04

tetradic

#040E2F #2F0423 #2F2504 #042F10

square

#040E2F #2F0423 #2F2504 #042F10

split-complementary

#040E2F #2F1004 #232F04

monochromatic

#02081C #02081C #040E2F #091F67 #0E30A0

Accessibility & contrast

On white

18.94

#040E2F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.11

#040E2F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040E2F

18.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040E2F	#FFFFFF	#000000	##FFFFFF
##040E2F	1.00	18.94	1.11	18.94
#FFFFFF	18.94	1.00	21.00	1.00
#000000	1.11	21.00	1.00	21.00
##FFFFFF	18.94	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001330

Deuteranopia (green-blind)

#000F2E

Tritanopia (blue-blind)

#00161C

Achromatopsia (no color)

#111111

Design tokens & code

CSS

--color: #040e2f;
/* rgb */ color: rgb(4, 14, 47);
/* oklch */ color: oklch(18.0% 0.068 265.2);

Tailwind

colors: {
  custom: {
    50: '#4a4d68',
    500: '#040e2f',
    950: '#000000',
  },
}

SCSS

$custom: #040e2f;
$custom-light: #4a4d68;
$custom-dark: #000000;

JSON

{
  "hex": "#040e2f",
  "rgb": {
    "r": 4,
    "g": 14,
    "b": 47
  },
  "hsl": {
    "h": 226.047,
    "s": 84.314,
    "l": 10
  },
  "oklch": {
    "l": 0.17975,
    "c": 0.06819,
    "h": 265.2
  },
  "luminance": 0.00545
}

Semantic roles & 50–950 ramp

primary

#040E2F

secondary

#725E1D

accent

#CB2DFB

background

#F4F4F6

surface

#E7E7EB

border

#C3C3C6

text

#010106

muted

#77777A

Preview Lab

Preview with #040E2F

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

Preview Lab → · Contrast checker → · Palette generator →