#0A153B#0A153B

#0A153B is a very dark, moderate blue. Relative luminance 0.009; OKLCH L 21.3% C 0.075 H 267.4°. Best body text is #FFFFFF at 17.75:1 contrast (WCAG AA passes).

Color values

HEX	#0A153B
RGB	rgb(10, 21, 59)
HSL	hsl(227, 71%, 14%)
HSV	hsv(227, 83%, 23%)
CMYK	cmyk(83.1%, 64.4%, 0%, 76.9%)
CIE-LAB	lab(8.28, 11.22, -26.00)
CIE-LCH	lch(8.28, 28.31, 293.35°)
OKLab	oklab(21.35% -0.0034 -0.0749)
OKLCH	oklch(21.35% 0.075 267.4)
XYZ	xyz(1.1825, 0.9165, 4.2514)
Luminance	0.0092 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#0A153B #3B300A

analogous

#0A2D3B #0A153B #170A3B

triadic

#0A153B #3B0A15 #153B0A

tetradic

#0A153B #3B0A2D #3B300A #0A3B17

square

#0A153B #3B0A2D #3B300A #0A3B17

split-complementary

#0A153B #3B170A #2D3B0A

monochromatic

#04091A #04091A #0A153B #13286F #1C3AA4

Accessibility & contrast

On white

17.75

#0A153B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.18

#0A153B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #0A153B

17.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##0A153B	#FFFFFF	#000000	##FFFFFF
##0A153B	1.00	17.75	1.18	17.75
#FFFFFF	17.75	1.00	21.00	1.00
#000000	1.18	21.00	1.00	21.00
##FFFFFF	17.75	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001A3C

Deuteranopia (green-blind)

#00163A

Tritanopia (blue-blind)

#001E25

Achromatopsia (no color)

#181818

Design tokens & code

CSS

--color: #0a153b;
/* rgb */ color: rgb(10, 21, 59);
/* oklch */ color: oklch(21.3% 0.075 267.4);

Tailwind

colors: {
  custom: {
    50: '#515171',
    500: '#0a153b',
    950: '#000000',
  },
}

SCSS

$custom: #0a153b;
$custom-light: #515171;
$custom-dark: #000000;

JSON

{
  "hex": "#0a153b",
  "rgb": {
    "r": 10,
    "g": 21,
    "b": 59
  },
  "hsl": {
    "h": 226.531,
    "s": 71.014,
    "l": 13.529
  },
  "oklch": {
    "l": 0.21345,
    "c": 0.07498,
    "h": 267.4
  },
  "luminance": 0.00917
}

Semantic roles & 50–950 ramp

primary

#0A153B

secondary

#786628

accent

#C53AEE

background

#F4F4F6

surface

#E7E7EC

border

#C3C3C7

text

#020208

muted

#78787B

Preview Lab

Preview with #0A153B

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

Preview Lab → · Contrast checker → · Palette generator →