#0A0A33#0A0A33

#0A0A33 is a very dark, moderate blue. Relative luminance 0.005; OKLCH L 18.0% C 0.078 H 275.2°. Best body text is #FFFFFF at 19.02:1 contrast (WCAG AA passes).

Color values

HEX	#0A0A33
RGB	rgb(10, 10, 51)
HSL	hsl(240, 67%, 12%)
HSV	hsv(240, 80%, 20%)
CMYK	cmyk(80.4%, 80.4%, 0%, 80%)
CIE-LAB	lab(4.70, 13.78, -25.95)
CIE-LCH	lch(4.70, 29.38, 297.96°)
OKLab	oklab(18.01% 0.0071 -0.0779)
OKLCH	oklch(18.01% 0.078 275.2)
XYZ	xyz(0.8311, 0.5206, 3.1880)
Luminance	0.0052 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#0A0A33 #33330A

analogous

#0A1F33 #0A0A33 #1F0A33

triadic

#0A0A33 #330A0A #0A330A

tetradic

#0A0A33 #330A1F #33330A #0A331F

square

#0A0A33 #330A1F #33330A #0A331F

split-complementary

#0A0A33 #331F0A #1F330A

monochromatic

#05051A #05051A #0A0A33 #141466 #1E1E99

Accessibility & contrast

On white

19.02

#0A0A33 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.10

#0A0A33 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #0A0A33

19.02:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##0A0A33	#FFFFFF	#000000	##FFFFFF
##0A0A33	1.00	19.02	1.10	19.02
#FFFFFF	19.02	1.00	21.00	1.00
#000000	1.10	21.00	1.00	21.00
##FFFFFF	19.02	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001234

Deuteranopia (green-blind)

#000E32

Tritanopia (blue-blind)

#00151D

Achromatopsia (no color)

#101010

Design tokens & code

CSS

--color: #0a0a33;
/* rgb */ color: rgb(10, 10, 51);
/* oklch */ color: oklch(18.0% 0.078 275.2);

Tailwind

colors: {
  custom: {
    50: '#4f4a6b',
    500: '#0a0a33',
    950: '#000000',
  },
}

SCSS

$custom: #0a0a33;
$custom-light: #4f4a6b;
$custom-dark: #000000;

JSON

{
  "hex": "#0a0a33",
  "rgb": {
    "r": 10,
    "g": 10,
    "b": 51
  },
  "hsl": {
    "h": 240,
    "s": 67.213,
    "l": 11.961
  },
  "oklch": {
    "l": 0.18011,
    "c": 0.07824,
    "h": 275.2
  },
  "luminance": 0.00521
}

Semantic roles & 50–950 ramp

primary

#0A0A33

secondary

#707028

accent

#EA3EEA

background

#F4F4F6

surface

#E7E7EB

border

#C3C3C6

text

#020106

muted

#78777A

Preview Lab

Preview with #0A0A33

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

Preview Lab → · Contrast checker → · Palette generator →