#0A1543#0A1543

#0A1543 is a very dark, moderate blue. Relative luminance 0.010; OKLCH L 22.2% C 0.088 H 267.9°. Best body text is #FFFFFF at 17.48:1 contrast (WCAG AA passes).

Color values

HEX	#0A1543
RGB	rgb(10, 21, 67)
HSL	hsl(228, 74%, 15%)
HSV	hsv(228, 85%, 26%)
CMYK	cmyk(85.1%, 68.7%, 0%, 73.7%)
CIE-LAB	lab(9.04, 14.81, -30.44)
CIE-LCH	lch(9.04, 33.85, 295.94°)
OKLab	oklab(22.16% -0.0031 -0.0879)
OKLCH	oklch(22.16% 0.088 267.9)
XYZ	xyz(1.4061, 1.0060, 5.4292)
Luminance	0.0101 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#0A1543 #43380A

analogous

#0A3143 #0A1543 #1B0A43

triadic

#0A1543 #430A15 #15430A

tetradic

#0A1543 #430A31 #43380A #0A431B

square

#0A1543 #430A31 #43380A #0A431B

split-complementary

#0A1543 #431B0A #31430A

monochromatic

#04081B #04081B #0A1543 #122678 #1A36AE

Accessibility & contrast

On white

17.48

#0A1543 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.20

#0A1543 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #0A1543

17.48:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##0A1543	#FFFFFF	#000000	##FFFFFF
##0A1543	1.00	17.48	1.20	17.48
#FFFFFF	17.48	1.00	21.00	1.00
#000000	1.20	21.00	1.00	21.00
##FFFFFF	17.48	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001C45

Deuteranopia (green-blind)

#001742

Tritanopia (blue-blind)

#002129

Achromatopsia (no color)

#1A1A1A

Design tokens & code

CSS

--color: #0a1543;
/* rgb */ color: rgb(10, 21, 67);
/* oklch */ color: oklch(22.2% 0.088 267.9);

Tailwind

colors: {
  custom: {
    50: '#545178',
    500: '#0a1543',
    950: '#000000',
  },
}

SCSS

$custom: #0a1543;
$custom-light: #545178;
$custom-dark: #000000;

JSON

{
  "hex": "#0a1543",
  "rgb": {
    "r": 10,
    "g": 21,
    "b": 67
  },
  "hsl": {
    "h": 228.421,
    "s": 74.026,
    "l": 15.098
  },
  "oklch": {
    "l": 0.22156,
    "c": 0.08801,
    "h": 267.9
  },
  "luminance": 0.01006
}

Semantic roles & 50–950 ramp

primary

#0A1543

secondary

#806F29

accent

#CD37F1

background

#F5F4F7

surface

#E9E7ED

border

#C5C3C8

text

#030209

muted

#78787B

Preview Lab

Preview with #0A1543

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

Preview Lab → · Contrast checker → · Palette generator →