#0A103A#0A103A

#0A103A is a very dark, moderate blue. Relative luminance 0.007; OKLCH L 20.1% C 0.081 H 270.8°. Best body text is #FFFFFF at 18.29:1 contrast (WCAG AA passes).

Color values

HEX	#0A103A
RGB	rgb(10, 16, 58)
HSL	hsl(233, 71%, 13%)
HSV	hsv(233, 83%, 23%)
CMYK	cmyk(82.8%, 72.4%, 0%, 77.3%)
CIE-LAB	lab(6.69, 14.40, -27.85)
CIE-LCH	lch(6.69, 31.36, 297.34°)
OKLab	oklab(20.08% 0.0012 -0.0808)
OKLCH	oklch(20.08% 0.081 270.8)
XYZ	xyz(1.0739, 0.7405, 4.0885)
Luminance	0.0074 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#0A103A #3A340A

analogous

#0A283A #0A103A #1C0A3A

triadic

#0A103A #3A0A10 #103A0A

tetradic

#0A103A #3A0A28 #3A340A #0A3A1C

square

#0A103A #3A0A28 #3A340A #0A3A1C

split-complementary

#0A103A #3A1C0A #283A0A

monochromatic

#05071A #05071A #0A103A #131E6E #1C2DA2

Accessibility & contrast

On white

18.29

#0A103A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.15

#0A103A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #0A103A

18.29:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##0A103A	#FFFFFF	#000000	##FFFFFF
##0A103A	1.00	18.29	1.15	18.29
#FFFFFF	18.29	1.00	21.00	1.00
#000000	1.15	21.00	1.00	21.00
##FFFFFF	18.29	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00173B

Deuteranopia (green-blind)

#001339

Tritanopia (blue-blind)

#001B23

Achromatopsia (no color)

#151515

Design tokens & code

CSS

--color: #0a103a;
/* rgb */ color: rgb(10, 16, 58);
/* oklch */ color: oklch(20.1% 0.081 270.8);

Tailwind

colors: {
  custom: {
    50: '#514e71',
    500: '#0a103a',
    950: '#000000',
  },
}

SCSS

$custom: #0a103a;
$custom-light: #514e71;
$custom-dark: #000000;

JSON

{
  "hex": "#0a103a",
  "rgb": {
    "r": 10,
    "g": 16,
    "b": 58
  },
  "hsl": {
    "h": 232.5,
    "s": 70.588,
    "l": 13.333
  },
  "oklch": {
    "l": 0.20075,
    "c": 0.08084,
    "h": 270.8
  },
  "luminance": 0.00741
}

Semantic roles & 50–950 ramp

primary

#0A103A

secondary

#776E28

accent

#D73AED

background

#F4F4F6

surface

#E7E7EC

border

#C3C3C7

text

#020107

muted

#78777A

Preview Lab

Preview with #0A103A

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

Preview Lab → · Contrast checker → · Palette generator →