#0B183F#0B183F

#0B183F is a very dark, moderate blue. Relative luminance 0.011; OKLCH L 22.5% C 0.077 H 266.3°. Best body text is #FFFFFF at 17.26:1 contrast (WCAG AA passes).

Color values

HEX	#0B183F
RGB	rgb(11, 24, 63)
HSL	hsl(225, 70%, 15%)
HSV	hsv(225, 83%, 25%)
CMYK	cmyk(82.5%, 61.9%, 0%, 75.3%)
CIE-LAB	lab(9.67, 10.80, -26.59)
CIE-LCH	lch(9.67, 28.70, 292.11°)
OKLab	oklab(22.52% -0.0049 -0.0766)
OKLCH	oklch(22.52% 0.077 266.3)
XYZ	xyz(1.3615, 1.0832, 4.8390)
Luminance	0.0108 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#0B183F #3F320B

analogous

#0B323F #0B183F #180B3F

triadic

#0B183F #3F0B18 #183F0B

tetradic

#0B183F #3F0B32 #3F320B #0B3F18

square

#0B183F #3F0B32 #3F320B #0B3F18

split-complementary

#0B183F #3F180B #323F0B

monochromatic

#050A1A #050A1A #0B183F #142C73 #1D40A7

Accessibility & contrast

On white

17.26

#0B183F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.22

#0B183F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #0B183F

17.26:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##0B183F	#FFFFFF	#000000	##FFFFFF
##0B183F	1.00	17.26	1.22	17.26
#FFFFFF	17.26	1.00	21.00	1.00
#000000	1.22	21.00	1.00	21.00
##FFFFFF	17.26	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001D40

Deuteranopia (green-blind)

#00193E

Tritanopia (blue-blind)

#002128

Achromatopsia (no color)

#1B1B1B

Design tokens & code

CSS

--color: #0b183f;
/* rgb */ color: rgb(11, 24, 63);
/* oklch */ color: oklch(22.5% 0.077 266.3);

Tailwind

colors: {
  custom: {
    50: '#535474',
    500: '#0b183f',
    950: '#000000',
  },
}

SCSS

$custom: #0b183f;
$custom-light: #535474;
$custom-dark: #000000;

JSON

{
  "hex": "#0b183f",
  "rgb": {
    "r": 11,
    "g": 24,
    "b": 63
  },
  "hsl": {
    "h": 225,
    "s": 70.27,
    "l": 14.51
  },
  "oklch": {
    "l": 0.22521,
    "c": 0.07673,
    "h": 266.3
  },
  "luminance": 0.01083
}

Semantic roles & 50–950 ramp

primary

#0B183F

secondary

#7C672A

accent

#C03BED

background

#F4F4F7

surface

#E8E7ED

border

#C4C3C8

text

#030208

muted

#78787B

Preview Lab

Preview with #0B183F

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

Preview Lab → · Contrast checker → · Palette generator →