#040740#040740

#040740 is a very dark, moderate blue. Relative luminance 0.005; OKLCH L 18.6% C 0.104 H 268.0°. Best body text is #FFFFFF at 18.93:1 contrast (WCAG AA passes).

Color values

HEX	#040740
RGB	rgb(4, 7, 64)
HSL	hsl(237, 88%, 13%)
HSV	hsv(237, 94%, 25%)
CMYK	cmyk(93.8%, 89.1%, 0%, 74.9%)
CIE-LAB	lab(4.95, 21.10, -35.02)
CIE-LCH	lch(4.95, 40.89, 301.07°)
OKLab	oklab(18.62% -0.0035 -0.104)
OKLCH	oklch(18.62% 0.104 268)
XYZ	xyz(1.0511, 0.5478, 4.8998)
Luminance	0.0055 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040740 #403D04

analogous

#042540 #040740 #1F0440

triadic

#040740 #400407 #074004

tetradic

#040740 #400425 #403D04 #04401F

square

#040740 #400425 #403D04 #04401F

split-complementary

#040740 #401F04 #254004

monochromatic

#02031D #02031D #040740 #080D7A #0B14B3

Accessibility & contrast

On white

18.93

#040740 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.11

#040740 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040740

18.93:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040740	#FFFFFF	#000000	##FFFFFF
##040740	1.00	18.93	1.11	18.93
#FFFFFF	18.93	1.00	21.00	1.00
#000000	1.11	21.00	1.00	21.00
##FFFFFF	18.93	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001442

Deuteranopia (green-blind)

#000D3F

Tritanopia (blue-blind)

#001923

Achromatopsia (no color)

#111111

Design tokens & code

CSS

--color: #040740;
/* rgb */ color: rgb(4, 7, 64);
/* oklch */ color: oklch(18.6% 0.104 268.0);

Tailwind

colors: {
  custom: {
    50: '#514876',
    500: '#040740',
    950: '#000000',
  },
}

SCSS

$custom: #040740;
$custom-light: #514876;
$custom-dark: #000000;

JSON

{
  "hex": "#040740",
  "rgb": {
    "r": 4,
    "g": 7,
    "b": 64
  },
  "hsl": {
    "h": 237,
    "s": 88.235,
    "l": 13.333
  },
  "oklch": {
    "l": 0.18617,
    "c": 0.10403,
    "h": 268
  },
  "luminance": 0.00548
}

Semantic roles & 50–950 ramp

primary

#040740

secondary

#817C1F

accent

#F429FE

background

#F4F4F7

surface

#E7E6ED

border

#C3C2C8

text

#030008

muted

#78777B

Preview Lab

Preview with #040740

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

Preview Lab → · Contrast checker → · Palette generator →