#0A123E#0A123E

#0A123E is a very dark, moderate blue. Relative luminance 0.008; OKLCH L 21.0% C 0.084 H 269.6°. Best body text is #FFFFFF at 17.96:1 contrast (WCAG AA passes).

Color values

HEX	#0A123E
RGB	rgb(10, 18, 62)
HSL	hsl(231, 72%, 14%)
HSV	hsv(231, 84%, 24%)
CMYK	cmyk(83.9%, 71%, 0%, 75.7%)
CIE-LAB	lab(7.63, 14.91, -29.19)
CIE-LCH	lch(7.63, 32.78, 297.06°)
OKLab	oklab(20.95% -0.0006 -0.0844)
OKLCH	oklch(20.95% 0.084 269.6)
XYZ	xyz(1.2107, 0.8448, 4.6558)
Luminance	0.0084 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#0A123E #3E360A

analogous

#0A2C3E #0A123E #1C0A3E

triadic

#0A123E #3E0A12 #123E0A

tetradic

#0A123E #3E0A2C #3E360A #0A3E1C

square

#0A123E #3E0A2C #3E360A #0A3E1C

split-complementary

#0A123E #3E1C0A #2C3E0A

monochromatic

#04081A #04081A #0A123E #132173 #1B31A7

Accessibility & contrast

On white

17.96

#0A123E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.17

#0A123E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #0A123E

17.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##0A123E	#FFFFFF	#000000	##FFFFFF
##0A123E	1.00	17.96	1.17	17.96
#FFFFFF	17.96	1.00	21.00	1.00
#000000	1.17	21.00	1.00	21.00
##FFFFFF	17.96	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00193F

Deuteranopia (green-blind)

#00143D

Tritanopia (blue-blind)

#001D25

Achromatopsia (no color)

#171717

Design tokens & code

CSS

--color: #0a123e;
/* rgb */ color: rgb(10, 18, 62);
/* oklch */ color: oklch(21.0% 0.084 269.6);

Tailwind

colors: {
  custom: {
    50: '#534f74',
    500: '#0a123e',
    950: '#000000',
  },
}

SCSS

$custom: #0a123e;
$custom-light: #534f74;
$custom-dark: #000000;

JSON

{
  "hex": "#0a123e",
  "rgb": {
    "r": 10,
    "g": 18,
    "b": 62
  },
  "hsl": {
    "h": 230.769,
    "s": 72.222,
    "l": 14.118
  },
  "oklch": {
    "l": 0.20951,
    "c": 0.08437,
    "h": 269.6
  },
  "luminance": 0.00845
}

Semantic roles & 50–950 ramp

primary

#0A123E

secondary

#7B6F28

accent

#D339EF

background

#F4F4F7

surface

#E8E7ED

border

#C4C3C8

text

#030208

muted

#78787B

Preview Lab

Preview with #0A123E

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

Preview Lab → · Contrast checker → · Palette generator →