#040640#040640

#040640 is a very dark, moderate blue. Relative luminance 0.005; OKLCH L 18.4% C 0.105 H 268.2°. Best body text is #FFFFFF at 19.00:1 contrast (WCAG AA passes).

Color values

HEX	#040640
RGB	rgb(4, 6, 64)
HSL	hsl(238, 88%, 13%)
HSV	hsv(238, 94%, 25%)
CMYK	cmyk(93.8%, 90.6%, 0%, 74.9%)
CIE-LAB	lab(4.75, 21.56, -35.34)
CIE-LCH	lch(4.75, 41.40, 301.39°)
OKLab	oklab(18.43% -0.0033 -0.1053)
OKLCH	oklch(18.43% 0.105 268.2)
XYZ	xyz(1.0403, 0.5261, 4.8962)
Luminance	0.0053 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Night Blue

#040348

ΔE00 2.51

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040640 #403E04

analogous

#042440 #040640 #200440

triadic

#040640 #400406 #064004

tetradic

#040640 #400424 #403E04 #044020

square

#040640 #400424 #403E04 #044020

split-complementary

#040640 #402004 #244004

monochromatic

#02031D #02031D #040640 #080B7A #0B11B3

Accessibility & contrast

On white

19.00

#040640 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.11

#040640 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040640

19.00:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040640	#FFFFFF	#000000	##FFFFFF
##040640	1.00	19.00	1.11	19.00
#FFFFFF	19.00	1.00	21.00	1.00
#000000	1.11	21.00	1.00	21.00
##FFFFFF	19.00	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001342

Deuteranopia (green-blind)

#000D3F

Tritanopia (blue-blind)

#001823

Achromatopsia (no color)

#101010

Design tokens & code

CSS

--color: #040640;
/* rgb */ color: rgb(4, 6, 64);
/* oklch */ color: oklch(18.4% 0.105 268.2);

Tailwind

colors: {
  custom: {
    50: '#514876',
    500: '#040640',
    950: '#000000',
  },
}

SCSS

$custom: #040640;
$custom-light: #514876;
$custom-dark: #000000;

JSON

{
  "hex": "#040640",
  "rgb": {
    "r": 4,
    "g": 6,
    "b": 64
  },
  "hsl": {
    "h": 238,
    "s": 88.235,
    "l": 13.333
  },
  "oklch": {
    "l": 0.18426,
    "c": 0.10531,
    "h": 268.2
  },
  "luminance": 0.00526
}

Semantic roles & 50–950 ramp

primary

#040640

secondary

#817E1F

accent

#F729FE

background

#F4F4F7

surface

#E8E6ED

border

#C4C2C8

text

#030008

muted

#78777B

Preview Lab

Preview with #040640

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

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