#0A0A37#0A0A37

#0A0A37 is a very dark, moderate blue. Relative luminance 0.006; OKLCH L 18.5% C 0.085 H 274.3°. Best body text is #FFFFFF at 18.90:1 contrast (WCAG AA passes).

Color values

HEX	#0A0A37
RGB	rgb(10, 10, 55)
HSL	hsl(240, 69%, 13%)
HSV	hsv(240, 82%, 22%)
CMYK	cmyk(81.8%, 81.8%, 0%, 78.4%)
CIE-LAB	lab(5.03, 16.01, -28.35)
CIE-LCH	lch(5.03, 32.56, 299.45°)
OKLab	oklab(18.49% 0.0064 -0.0843)
OKLCH	oklch(18.49% 0.085 274.3)
XYZ	xyz(0.9231, 0.5574, 3.6726)
Luminance	0.0056 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#0A0A37 #37370A

analogous

#0A2037 #0A0A37 #200A37

triadic

#0A0A37 #370A0A #0A370A

tetradic

#0A0A37 #370A20 #37370A #0A3720

square

#0A0A37 #370A20 #37370A #0A3720

split-complementary

#0A0A37 #37200A #20370A

monochromatic

#05051A #05051A #0A0A37 #13136B #1D1D9F

Accessibility & contrast

On white

18.90

#0A0A37 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.11

#0A0A37 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #0A0A37

18.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##0A0A37	#FFFFFF	#000000	##FFFFFF
##0A0A37	1.00	18.90	1.11	18.90
#FFFFFF	18.90	1.00	21.00	1.00
#000000	1.11	21.00	1.00	21.00
##FFFFFF	18.90	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001338

Deuteranopia (green-blind)

#000F36

Tritanopia (blue-blind)

#00161F

Achromatopsia (no color)

#111111

Design tokens & code

CSS

--color: #0a0a37;
/* rgb */ color: rgb(10, 10, 55);
/* oklch */ color: oklch(18.5% 0.085 274.3);

Tailwind

colors: {
  custom: {
    50: '#504a6e',
    500: '#0a0a37',
    950: '#000000',
  },
}

SCSS

$custom: #0a0a37;
$custom-light: #504a6e;
$custom-dark: #000000;

JSON

{
  "hex": "#0a0a37",
  "rgb": {
    "r": 10,
    "g": 10,
    "b": 55
  },
  "hsl": {
    "h": 240,
    "s": 69.231,
    "l": 12.745
  },
  "oklch": {
    "l": 0.18486,
    "c": 0.08453,
    "h": 274.3
  },
  "luminance": 0.00557
}

Semantic roles & 50–950 ramp

primary

#0A0A37

secondary

#747428

accent

#EC3CEC

background

#F4F4F6

surface

#E7E7EC

border

#C3C3C7

text

#020107

muted

#78777A

Preview Lab

Preview with #0A0A37

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

Preview Lab → · Contrast checker → · Palette generator →