#040F40#040F40

#040F40 is a very dark, moderate blue. Relative luminance 0.007; OKLCH L 20.1% C 0.094 H 266.0°. Best body text is #FFFFFF at 18.30:1 contrast (WCAG AA passes).

Color values

HEX	#040F40
RGB	rgb(4, 15, 64)
HSL	hsl(229, 88%, 13%)
HSV	hsv(229, 94%, 25%)
CMYK	cmyk(93.8%, 76.6%, 0%, 74.9%)
CIE-LAB	lab(6.66, 16.97, -32.22)
CIE-LCH	lch(6.66, 36.42, 297.78°)
OKLab	oklab(20.15% -0.0065 -0.0938)
OKLCH	oklch(20.15% 0.094 266)
XYZ	xyz(1.1460, 0.7375, 4.9314)
Luminance	0.0074 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040F40 #403504

analogous

#042D40 #040F40 #170440

triadic

#040F40 #40040F #0F4004

tetradic

#040F40 #40042D #403504 #044017

square

#040F40 #40042D #403504 #044017

split-complementary

#040F40 #401704 #2D4004

monochromatic

#02071D #02071D #040F40 #081C7A #0B2AB3

Accessibility & contrast

On white

18.30

#040F40 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.15

#040F40 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040F40

18.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040F40	#FFFFFF	#000000	##FFFFFF
##040F40	1.00	18.30	1.15	18.30
#FFFFFF	18.30	1.00	21.00	1.00
#000000	1.15	21.00	1.00	21.00
##FFFFFF	18.30	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001842

Deuteranopia (green-blind)

#00123F

Tritanopia (blue-blind)

#001C25

Achromatopsia (no color)

#151515

Design tokens & code

CSS

--color: #040f40;
/* rgb */ color: rgb(4, 15, 64);
/* oklch */ color: oklch(20.1% 0.094 266.0);

Tailwind

colors: {
  custom: {
    50: '#514d75',
    500: '#040f40',
    950: '#000000',
  },
}

SCSS

$custom: #040f40;
$custom-light: #514d75;
$custom-dark: #000000;

JSON

{
  "hex": "#040f40",
  "rgb": {
    "r": 4,
    "g": 15,
    "b": 64
  },
  "hsl": {
    "h": 229,
    "s": 88.235,
    "l": 13.333
  },
  "oklch": {
    "l": 0.20145,
    "c": 0.09402,
    "h": 266
  },
  "luminance": 0.00738
}

Semantic roles & 50–950 ramp

primary

#040F40

secondary

#816F1F

accent

#D729FE

background

#F4F4F7

surface

#E7E7ED

border

#C3C3C8

text

#030108

muted

#78777B

Preview Lab

Preview with #040F40

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

Preview Lab → · Contrast checker → · Palette generator →