#031B40#031B40

#031B40 is a very dark, moderate blue. Relative luminance 0.012; OKLCH L 23.0% C 0.077 H 258.4°. Best body text is #FFFFFF at 17.01:1 contrast (WCAG AA passes).

Color values

HEX	#031B40
RGB	rgb(3, 27, 64)
HSL	hsl(216, 91%, 13%)
HSV	hsv(216, 95%, 25%)
CMYK	cmyk(95.3%, 57.8%, 0%, 74.9%)
CIE-LAB	lab(10.36, 7.61, -26.20)
CIE-LCH	lch(10.36, 27.28, 286.20°)
OKLab	oklab(22.96% -0.0155 -0.0755)
OKLCH	oklch(22.96% 0.077 258.4)
XYZ	xyz(1.3546, 1.1732, 5.0046)
Luminance	0.0117 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#031B40 #402803

analogous

#033940 #031B40 #090340

triadic

#031B40 #40031B #1B4003

tetradic

#031B40 #400339 #402803 #034009

square

#031B40 #400339 #402803 #034009

split-complementary

#031B40 #400903 #394003

monochromatic

#010C1D #010C1D #031B40 #06347A #084CB5

Accessibility & contrast

On white

17.01

#031B40 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.23

#031B40 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #031B40

17.01:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##031B40	#FFFFFF	#000000	##FFFFFF
##031B40	1.00	17.01	1.23	17.01
#FFFFFF	17.01	1.00	21.00	1.00
#000000	1.23	21.00	1.00	21.00
##FFFFFF	17.01	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#041F41

Deuteranopia (green-blind)

#001A3F

Tritanopia (blue-blind)

#00242A

Achromatopsia (no color)

#1C1C1C

Design tokens & code

CSS

--color: #031b40;
/* rgb */ color: rgb(3, 27, 64);
/* oklch */ color: oklch(23.0% 0.077 258.4);

Tailwind

colors: {
  custom: {
    50: '#505675',
    500: '#031b40',
    950: '#000000',
  },
}

SCSS

$custom: #031b40;
$custom-light: #505675;
$custom-dark: #000000;

JSON

{
  "hex": "#031b40",
  "rgb": {
    "r": 3,
    "g": 27,
    "b": 64
  },
  "hsl": {
    "h": 216.393,
    "s": 91.045,
    "l": 13.137
  },
  "oklch": {
    "l": 0.22963,
    "c": 0.0771,
    "h": 258.4
  },
  "luminance": 0.01173
}

Semantic roles & 50–950 ramp

primary

#031B40

secondary

#825A1D

accent

#AB29FF

background

#F4F5F7

surface

#E7E9ED

border

#C3C5C8

text

#020308

muted

#78787B

Preview Lab

Preview with #031B40

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

Preview Lab → · Contrast checker → · Palette generator →