#0A183E#0A183E

#0A183E is a very dark, moderate blue. Relative luminance 0.011; OKLCH L 22.4% C 0.075 H 265.4°. Best body text is #FFFFFF at 17.31:1 contrast (WCAG AA passes).

Color values

HEX	#0A183E
RGB	rgb(10, 24, 62)
HSL	hsl(224, 72%, 14%)
HSV	hsv(224, 84%, 24%)
CMYK	cmyk(83.9%, 61.3%, 0%, 75.7%)
CIE-LAB	lab(9.53, 10.19, -26.11)
CIE-LCH	lch(9.53, 28.03, 291.32°)
OKLab	oklab(22.37% -0.006 -0.0752)
OKLCH	oklch(22.37% 0.075 265.4)
XYZ	xyz(1.3210, 1.0655, 4.6925)
Luminance	0.0107 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#0A183E #3E300A

analogous

#0A323E #0A183E #160A3E

triadic

#0A183E #3E0A18 #183E0A

tetradic

#0A183E #3E0A32 #3E300A #0A3E16

square

#0A183E #3E0A32 #3E300A #0A3E16

split-complementary

#0A183E #3E160A #323E0A

monochromatic

#040A1A #040A1A #0A183E #132C73 #1B41A7

Accessibility & contrast

On white

17.31

#0A183E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.21

#0A183E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #0A183E

17.31:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##0A183E	#FFFFFF	#000000	##FFFFFF
##0A183E	1.00	17.31	1.21	17.31
#FFFFFF	17.31	1.00	21.00	1.00
#000000	1.21	21.00	1.00	21.00
##FFFFFF	17.31	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#011D3F

Deuteranopia (green-blind)

#00183D

Tritanopia (blue-blind)

#002128

Achromatopsia (no color)

#1B1B1B

Design tokens & code

CSS

--color: #0a183e;
/* rgb */ color: rgb(10, 24, 62);
/* oklch */ color: oklch(22.4% 0.075 265.4);

Tailwind

colors: {
  custom: {
    50: '#525474',
    500: '#0a183e',
    950: '#000000',
  },
}

SCSS

$custom: #0a183e;
$custom-light: #525474;
$custom-dark: #000000;

JSON

{
  "hex": "#0a183e",
  "rgb": {
    "r": 10,
    "g": 24,
    "b": 62
  },
  "hsl": {
    "h": 223.846,
    "s": 72.222,
    "l": 14.118
  },
  "oklch": {
    "l": 0.22372,
    "c": 0.07543,
    "h": 265.4
  },
  "luminance": 0.01066
}

Semantic roles & 50–950 ramp

primary

#0A183E

secondary

#7B6528

accent

#BE39EF

background

#F4F4F7

surface

#E7E7ED

border

#C3C3C8

text

#030208

muted

#78787B

Preview Lab

Preview with #0A183E

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

Preview Lab → · Contrast checker → · Palette generator →