#0B1540#0B1540

#0B1540 is a very dark, moderate blue. Relative luminance 0.010; OKLCH L 21.9% C 0.083 H 268.6°. Best body text is #FFFFFF at 17.56:1 contrast (WCAG AA passes).

Color values

HEX	#0B1540
RGB	rgb(11, 21, 64)
HSL	hsl(229, 71%, 15%)
HSV	hsv(229, 83%, 25%)
CMYK	cmyk(82.8%, 67.2%, 0%, 74.9%)
CIE-LAB	lab(8.80, 13.62, -28.70)
CIE-LCH	lch(8.80, 31.77, 295.38°)
OKLab	oklab(21.9% -0.0021 -0.0828)
OKLCH	oklch(21.9% 0.083 268.6)
XYZ	xyz(1.3313, 0.9775, 4.9680)
Luminance	0.0098 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#0B1540 #40360B

analogous

#0B3040 #0B1540 #1B0B40

triadic

#0B1540 #400B15 #15400B

tetradic

#0B1540 #400B30 #40360B #0B401B

square

#0B1540 #400B30 #40360B #0B401B

split-complementary

#0B1540 #401B0B #30400B

monochromatic

#04091A #04091A #0B1540 #142674 #1D37A8

Accessibility & contrast

On white

17.56

#0B1540 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.20

#0B1540 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #0B1540

17.56:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##0B1540	#FFFFFF	#000000	##FFFFFF
##0B1540	1.00	17.56	1.20	17.56
#FFFFFF	17.56	1.00	21.00	1.00
#000000	1.20	21.00	1.00	21.00
##FFFFFF	17.56	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001C41

Deuteranopia (green-blind)

#00173F

Tritanopia (blue-blind)

#002028

Achromatopsia (no color)

#191919

Design tokens & code

CSS

--color: #0b1540;
/* rgb */ color: rgb(11, 21, 64);
/* oklch */ color: oklch(21.9% 0.083 268.6);

Tailwind

colors: {
  custom: {
    50: '#535175',
    500: '#0b1540',
    950: '#000000',
  },
}

SCSS

$custom: #0b1540;
$custom-light: #535175;
$custom-dark: #000000;

JSON

{
  "hex": "#0b1540",
  "rgb": {
    "r": 11,
    "g": 21,
    "b": 64
  },
  "hsl": {
    "h": 228.679,
    "s": 70.667,
    "l": 14.706
  },
  "oklch": {
    "l": 0.21902,
    "c": 0.08286,
    "h": 268.6
  },
  "luminance": 0.00978
}

Semantic roles & 50–950 ramp

primary

#0B1540

secondary

#7D6D2A

accent

#CC3AED

background

#F5F4F7

surface

#E9E7ED

border

#C5C3C8

text

#030208

muted

#78787B

Preview Lab

Preview with #0B1540

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

Preview Lab → · Contrast checker → · Palette generator →