#040731#040731

#040731 is a very dark, moderate blue. Relative luminance 0.004; OKLCH L 16.6% C 0.082 H 269.4°. Best body text is #FFFFFF at 19.44:1 contrast (WCAG AA passes).

Color values

HEX	#040731
RGB	rgb(4, 7, 49)
HSL	hsl(236, 85%, 10%)
HSV	hsv(236, 92%, 19%)
CMYK	cmyk(91.8%, 85.7%, 0%, 80.8%)
CIE-LAB	lab(3.61, 12.31, -26.24)
CIE-LCH	lch(3.61, 28.98, 295.14°)
OKLab	oklab(16.57% -0.0008 -0.082)
OKLCH	oklch(16.57% 0.082 269.4)
XYZ	xyz(0.6802, 0.3994, 2.9464)
Luminance	0.0040 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040731 #312E04

analogous

#041D31 #040731 #170431

triadic

#040731 #310407 #073104

tetradic

#040731 #31041D #312E04 #043117

square

#040731 #31041D #312E04 #043117

split-complementary

#040731 #311704 #1D3104

monochromatic

#02041C #02041C #040731 #090F6A #0D17A2

Accessibility & contrast

On white

19.44

#040731 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.08

#040731 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040731

19.44:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040731	#FFFFFF	#000000	##FFFFFF
##040731	1.00	19.44	1.08	19.44
#FFFFFF	19.44	1.00	21.00	1.00
#000000	1.08	21.00	1.00	21.00
##FFFFFF	19.44	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#000F32

Deuteranopia (green-blind)

#000B30

Tritanopia (blue-blind)

#00131B

Achromatopsia (no color)

#0D0D0D

Design tokens & code

CSS

--color: #040731;
/* rgb */ color: rgb(4, 7, 49);
/* oklch */ color: oklch(16.6% 0.082 269.4);

Tailwind

colors: {
  custom: {
    50: '#4b4969',
    500: '#040731',
    950: '#000000',
  },
}

SCSS

$custom: #040731;
$custom-light: #4b4969;
$custom-dark: #000000;

JSON

{
  "hex": "#040731",
  "rgb": {
    "r": 4,
    "g": 7,
    "b": 49
  },
  "hsl": {
    "h": 236,
    "s": 84.906,
    "l": 10.392
  },
  "oklch": {
    "l": 0.1657,
    "c": 0.08201,
    "h": 269.4
  },
  "luminance": 0.004
}

Semantic roles & 50–950 ramp

primary

#040731

secondary

#736E1D

accent

#ED2DFB

background

#F4F4F6

surface

#E7E6EB

border

#C3C2C6

text

#010006

muted

#77777A

Preview Lab

Preview with #040731

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

Preview Lab → · Contrast checker → · Palette generator →