#0B1840#0B1840

#0B1840 is a very dark, moderate blue. Relative luminance 0.011; OKLCH L 22.6% C 0.078 H 266.5°. Best body text is #FFFFFF at 17.23:1 contrast (WCAG AA passes).

Color values

HEX	#0B1840
RGB	rgb(11, 24, 64)
HSL	hsl(225, 71%, 15%)
HSV	hsv(225, 83%, 25%)
CMYK	cmyk(82.8%, 62.5%, 0%, 74.9%)
CIE-LAB	lab(9.75, 11.25, -27.16)
CIE-LCH	lch(9.75, 29.40, 292.51°)
OKLab	oklab(22.62% -0.0048 -0.0782)
OKLCH	oklch(22.62% 0.078 266.5)
XYZ	xyz(1.3897, 1.0944, 4.9875)
Luminance	0.0109 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#0B1840 #40330B

analogous

#0B3340 #0B1840 #190B40

triadic

#0B1840 #400B18 #18400B

tetradic

#0B1840 #400B33 #40330B #0B4019

square

#0B1840 #400B33 #40330B #0B4019

split-complementary

#0B1840 #40190B #33400B

monochromatic

#040A1A #040A1A #0B1840 #142C74 #1D3FA8

Accessibility & contrast

On white

17.23

#0B1840 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.22

#0B1840 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #0B1840

17.23:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##0B1840	#FFFFFF	#000000	##FFFFFF
##0B1840	1.00	17.23	1.22	17.23
#FFFFFF	17.23	1.00	21.00	1.00
#000000	1.22	21.00	1.00	21.00
##FFFFFF	17.23	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001E41

Deuteranopia (green-blind)

#00193F

Tritanopia (blue-blind)

#002229

Achromatopsia (no color)

#1B1B1B

Design tokens & code

CSS

--color: #0b1840;
/* rgb */ color: rgb(11, 24, 64);
/* oklch */ color: oklch(22.6% 0.078 266.5);

Tailwind

colors: {
  custom: {
    50: '#535475',
    500: '#0b1840',
    950: '#000000',
  },
}

SCSS

$custom: #0b1840;
$custom-light: #535475;
$custom-dark: #000000;

JSON

{
  "hex": "#0b1840",
  "rgb": {
    "r": 11,
    "g": 24,
    "b": 64
  },
  "hsl": {
    "h": 225.283,
    "s": 70.667,
    "l": 14.706
  },
  "oklch": {
    "l": 0.22616,
    "c": 0.07838,
    "h": 266.5
  },
  "luminance": 0.01095
}

Semantic roles & 50–950 ramp

primary

#0B1840

secondary

#7D682A

accent

#C23AED

background

#F5F4F7

surface

#E8E7ED

border

#C4C3C8

text

#030208

muted

#78787B

Preview Lab

Preview with #0B1840

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

Preview Lab → · Contrast checker → · Palette generator →