#040F30#040F30

#040F30 is a very dark, moderate blue. Relative luminance 0.006; OKLCH L 18.3% C 0.068 H 264.6°. Best body text is #FFFFFF at 18.81:1 contrast (WCAG AA passes).

Color values

HEX	#040F30
RGB	rgb(4, 15, 48)
HSL	hsl(225, 85%, 10%)
HSV	hsv(225, 92%, 19%)
CMYK	cmyk(91.7%, 68.7%, 0%, 81.2%)
CIE-LAB	lab(5.25, 8.28, -22.88)
CIE-LCH	lch(5.25, 24.33, 289.90°)
OKLab	oklab(18.33% -0.0064 -0.068)
OKLCH	oklch(18.33% 0.068 264.6)
XYZ	xyz(0.7542, 0.5808, 2.8681)
Luminance	0.0058 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 4.90

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040F30 #302504

analogous

#042530 #040F30 #0F0430

triadic

#040F30 #30040F #0F3004

tetradic

#040F30 #300425 #302504 #04300F

square

#040F30 #300425 #302504 #04300F

split-complementary

#040F30 #300F04 #253004

monochromatic

#02091C #02091C #040F30 #092168 #0D32A1

Accessibility & contrast

On white

18.81

#040F30 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.12

#040F30 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040F30

18.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040F30	#FFFFFF	#000000	##FFFFFF
##040F30	1.00	18.81	1.12	18.81
#FFFFFF	18.81	1.00	21.00	1.00
#000000	1.12	21.00	1.00	21.00
##FFFFFF	18.81	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001431

Deuteranopia (green-blind)

#000F2F

Tritanopia (blue-blind)

#00171D

Achromatopsia (no color)

#111111

Design tokens & code

CSS

--color: #040f30;
/* rgb */ color: rgb(4, 15, 48);
/* oklch */ color: oklch(18.3% 0.068 264.6);

Tailwind

colors: {
  custom: {
    50: '#4b4d68',
    500: '#040f30',
    950: '#000000',
  },
}

SCSS

$custom: #040f30;
$custom-light: #4b4d68;
$custom-dark: #000000;

JSON

{
  "hex": "#040f30",
  "rgb": {
    "r": 4,
    "g": 15,
    "b": 48
  },
  "hsl": {
    "h": 225,
    "s": 84.615,
    "l": 10.196
  },
  "oklch": {
    "l": 0.18334,
    "c": 0.06833,
    "h": 264.6
  },
  "luminance": 0.00581
}

Semantic roles & 50–950 ramp

primary

#040F30

secondary

#725D1D

accent

#C72DFB

background

#F4F4F6

surface

#E7E7EB

border

#C3C3C6

text

#010106

muted

#77777A

Preview Lab

Preview with #040F30

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

Preview Lab → · Contrast checker → · Palette generator →