#0B183E#0B183E

#0B183E is a very dark, moderate blue. Relative luminance 0.011; OKLCH L 22.4% C 0.075 H 266.2°. Best body text is #FFFFFF at 17.29:1 contrast (WCAG AA passes).

Color values

HEX	#0B183E
RGB	rgb(11, 24, 62)
HSL	hsl(225, 70%, 14%)
HSV	hsv(225, 82%, 24%)
CMYK	cmyk(82.3%, 61.3%, 0%, 75.7%)
CIE-LAB	lab(9.58, 10.35, -26.02)
CIE-LCH	lch(9.58, 28.01, 291.69°)
OKLab	oklab(22.43% -0.005 -0.0749)
OKLCH	oklch(22.43% 0.075 266.2)
XYZ	xyz(1.3338, 1.0721, 4.6931)
Luminance	0.0107 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#0B183E #3E310B

analogous

#0B323E #0B183E #180B3E

triadic

#0B183E #3E0B18 #183E0B

tetradic

#0B183E #3E0B32 #3E310B #0B3E18

square

#0B183E #3E0B32 #3E310B #0B3E18

split-complementary

#0B183E #3E180B #323E0B

monochromatic

#050A1A #050A1A #0B183E #142C72 #1D40A6

Accessibility & contrast

On white

17.29

#0B183E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.21

#0B183E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #0B183E

17.29:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##0B183E	#FFFFFF	#000000	##FFFFFF
##0B183E	1.00	17.29	1.21	17.29
#FFFFFF	17.29	1.00	21.00	1.00
#000000	1.21	21.00	1.00	21.00
##FFFFFF	17.29	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#011D3F

Deuteranopia (green-blind)

#00183D

Tritanopia (blue-blind)

#002128

Achromatopsia (no color)

#1B1B1B

Design tokens & code

CSS

--color: #0b183e;
/* rgb */ color: rgb(11, 24, 62);
/* oklch */ color: oklch(22.4% 0.075 266.2);

Tailwind

colors: {
  custom: {
    50: '#525474',
    500: '#0b183e',
    950: '#000000',
  },
}

SCSS

$custom: #0b183e;
$custom-light: #525474;
$custom-dark: #000000;

JSON

{
  "hex": "#0b183e",
  "rgb": {
    "r": 11,
    "g": 24,
    "b": 62
  },
  "hsl": {
    "h": 224.706,
    "s": 69.863,
    "l": 14.314
  },
  "oklch": {
    "l": 0.22427,
    "c": 0.07507,
    "h": 266.2
  },
  "luminance": 0.01072
}

Semantic roles & 50–950 ramp

primary

#0B183E

secondary

#7B662A

accent

#BF3BED

background

#F4F4F7

surface

#E7E7ED

border

#C3C3C8

text

#030208

muted

#78787B

Preview Lab

Preview with #0B183E

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

Preview Lab → · Contrast checker → · Palette generator →