#040537#040537

#040537 is a very dark, moderate blue. Relative luminance 0.004; OKLCH L 16.9% C 0.094 H 269.4°. Best body text is #FFFFFF at 19.41:1 contrast (WCAG AA passes).

Color values

HEX	#040537
RGB	rgb(4, 5, 55)
HSL	hsl(239, 86%, 12%)
HSV	hsv(239, 93%, 22%)
CMYK	cmyk(92.7%, 90.9%, 0%, 78.4%)
CIE-LAB	lab(3.70, 16.55, -30.52)
CIE-LCH	lch(3.70, 34.72, 298.46°)
OKLab	oklab(16.93% -0.001 -0.0941)
OKLCH	oklch(16.93% 0.094 269.4)
XYZ	xyz(0.7937, 0.4101, 3.6510)
Luminance	0.0041 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040537 #373604

analogous

#041F37 #040537 #1D0437

triadic

#040537 #370405 #053704

tetradic

#040537 #37041F #373604 #04371D

square

#040537 #37041F #373604 #04371D

split-complementary

#040537 #371D04 #1F3704

monochromatic

#02031D #02031D #040537 #080A70 #0C0FA9

Accessibility & contrast

On white

19.41

#040537 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.08

#040537 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040537

19.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040537	#FFFFFF	#000000	##FFFFFF
##040537	1.00	19.41	1.08	19.41
#FFFFFF	19.41	1.00	21.00	1.00
#000000	1.08	21.00	1.00	21.00
##FFFFFF	19.41	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001038

Deuteranopia (green-blind)

#000A36

Tritanopia (blue-blind)

#00141E

Achromatopsia (no color)

#0D0D0D

Design tokens & code

CSS

--color: #040537;
/* rgb */ color: rgb(4, 5, 55);
/* oklch */ color: oklch(16.9% 0.094 269.4);

Tailwind

colors: {
  custom: {
    50: '#4d486e',
    500: '#040537',
    950: '#000000',
  },
}

SCSS

$custom: #040537;
$custom-light: #4d486e;
$custom-dark: #000000;

JSON

{
  "hex": "#040537",
  "rgb": {
    "r": 4,
    "g": 5,
    "b": 55
  },
  "hsl": {
    "h": 238.824,
    "s": 86.441,
    "l": 11.569
  },
  "oklch": {
    "l": 0.16926,
    "c": 0.09408,
    "h": 269.4
  },
  "luminance": 0.0041
}

Semantic roles & 50–950 ramp

primary

#040537

secondary

#79771E

accent

#F92BFD

background

#F4F4F6

surface

#E7E6EC

border

#C3C2C7

text

#020007

muted

#78777A

Preview Lab

Preview with #040537

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

Preview Lab → · Contrast checker → · Palette generator →