#0A123F#0A123F

#0A123F is a very dark, moderate blue. Relative luminance 0.009; OKLCH L 21.1% C 0.086 H 269.5°. Best body text is #FFFFFF at 17.93:1 contrast (WCAG AA passes).

Color values

HEX	#0A123F
RGB	rgb(10, 18, 63)
HSL	hsl(231, 73%, 14%)
HSV	hsv(231, 84%, 25%)
CMYK	cmyk(84.1%, 71.4%, 0%, 75.3%)
CIE-LAB	lab(7.73, 15.37, -29.74)
CIE-LCH	lch(7.73, 33.48, 297.32°)
OKLab	oklab(21.06% -0.0007 -0.086)
OKLCH	oklch(21.06% 0.086 269.5)
XYZ	xyz(1.2384, 0.8559, 4.8016)
Luminance	0.0086 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#0A123F #3F370A

analogous

#0A2D3F #0A123F #1D0A3F

triadic

#0A123F #3F0A12 #123F0A

tetradic

#0A123F #3F0A2D #3F370A #0A3F1D

square

#0A123F #3F0A2D #3F370A #0A3F1D

split-complementary

#0A123F #3F1D0A #2D3F0A

monochromatic

#04081A #04081A #0A123F #122174 #1B30A9

Accessibility & contrast

On white

17.93

#0A123F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.17

#0A123F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #0A123F

17.93:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##0A123F	#FFFFFF	#000000	##FFFFFF
##0A123F	1.00	17.93	1.17	17.93
#FFFFFF	17.93	1.00	21.00	1.00
#000000	1.17	21.00	1.00	21.00
##FFFFFF	17.93	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001A40

Deuteranopia (green-blind)

#00153E

Tritanopia (blue-blind)

#001E26

Achromatopsia (no color)

#171717

Design tokens & code

CSS

--color: #0a123f;
/* rgb */ color: rgb(10, 18, 63);
/* oklch */ color: oklch(21.1% 0.086 269.5);

Tailwind

colors: {
  custom: {
    50: '#534f75',
    500: '#0a123f',
    950: '#000000',
  },
}

SCSS

$custom: #0a123f;
$custom-light: #534f75;
$custom-dark: #000000;

JSON

{
  "hex": "#0a123f",
  "rgb": {
    "r": 10,
    "g": 18,
    "b": 63
  },
  "hsl": {
    "h": 230.943,
    "s": 72.603,
    "l": 14.314
  },
  "oklch": {
    "l": 0.21059,
    "c": 0.08597,
    "h": 269.5
  },
  "luminance": 0.00856
}

Semantic roles & 50–950 ramp

primary

#0A123F

secondary

#7C7029

accent

#D438EF

background

#F5F4F7

surface

#E8E7ED

border

#C4C3C8

text

#030208

muted

#78787B

Preview Lab

Preview with #0A123F

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

Preview Lab → · Contrast checker → · Palette generator →