#040C2F#040C2F

#040C2F is a very dark, moderate blue. Relative luminance 0.005; OKLCH L 17.5% C 0.071 H 266.7°. Best body text is #FFFFFF at 19.11:1 contrast (WCAG AA passes).

Color values

HEX	#040C2F
RGB	rgb(4, 12, 47)
HSL	hsl(229, 84%, 10%)
HSV	hsv(229, 91%, 18%)
CMYK	cmyk(91.5%, 74.5%, 0%, 81.6%)
CIE-LAB	lab(4.46, 9.22, -23.38)
CIE-LCH	lch(4.46, 25.14, 291.52°)
OKLab	oklab(17.48% -0.004 -0.0711)
OKLCH	oklch(17.48% 0.071 266.7)
XYZ	xyz(0.6945, 0.4939, 2.7475)
Luminance	0.0049 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 4.32

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040C2F #2F2704

analogous

#04222F #040C2F #11042F

triadic

#040C2F #2F040C #0C2F04

tetradic

#040C2F #2F0422 #2F2704 #042F11

square

#040C2F #2F0422 #2F2704 #042F11

split-complementary

#040C2F #2F1104 #222F04

monochromatic

#02071C #02071C #040C2F #091A67 #0E29A0

Accessibility & contrast

On white

19.11

#040C2F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.10

#040C2F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040C2F

19.11:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040C2F	#FFFFFF	#000000	##FFFFFF
##040C2F	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)

#001230

Deuteranopia (green-blind)

#000D2E

Tritanopia (blue-blind)

#00151B

Achromatopsia (no color)

#0F0F0F

Design tokens & code

CSS

--color: #040c2f;
/* rgb */ color: rgb(4, 12, 47);
/* oklch */ color: oklch(17.5% 0.071 266.7);

Tailwind

colors: {
  custom: {
    50: '#4a4c68',
    500: '#040c2f',
    950: '#000000',
  },
}

SCSS

$custom: #040c2f;
$custom-light: #4a4c68;
$custom-dark: #000000;

JSON

{
  "hex": "#040c2f",
  "rgb": {
    "r": 4,
    "g": 12,
    "b": 47
  },
  "hsl": {
    "h": 228.837,
    "s": 84.314,
    "l": 10
  },
  "oklch": {
    "l": 0.17483,
    "c": 0.07127,
    "h": 266.7
  },
  "luminance": 0.00494
}

Semantic roles & 50–950 ramp

primary

#040C2F

secondary

#72621D

accent

#D42DFB

background

#F4F4F6

surface

#E7E7EB

border

#C3C3C6

text

#010106

muted

#77777A

Preview Lab

Preview with #040C2F

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

Preview Lab → · Contrast checker → · Palette generator →