#0A1540#0A1540

#0A1540 is a very dark, moderate blue. Relative luminance 0.010; OKLCH L 21.8% C 0.083 H 267.8°. Best body text is #FFFFFF at 17.58:1 contrast (WCAG AA passes).

Color values

HEX	#0A1540
RGB	rgb(10, 21, 64)
HSL	hsl(228, 73%, 15%)
HSV	hsv(228, 84%, 25%)
CMYK	cmyk(84.4%, 67.2%, 0%, 74.9%)
CIE-LAB	lab(8.75, 13.47, -28.80)
CIE-LCH	lch(8.75, 31.79, 295.07°)
OKLab	oklab(21.85% -0.0032 -0.0831)
OKLCH	oklch(21.85% 0.083 267.8)
XYZ	xyz(1.3184, 0.9709, 4.9674)
Luminance	0.0097 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 4.15

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#0A1540 #40350A

analogous

#0A3040 #0A1540 #1A0A40

triadic

#0A1540 #400A15 #15400A

tetradic

#0A1540 #400A30 #40350A #0A401A

square

#0A1540 #400A30 #40350A #0A401A

split-complementary

#0A1540 #401A0A #30400A

monochromatic

#04091A #04091A #0A1540 #122675 #1B38AA

Accessibility & contrast

On white

17.58

#0A1540 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.19

#0A1540 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #0A1540

17.58:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##0A1540	#FFFFFF	#000000	##FFFFFF
##0A1540	1.00	17.58	1.19	17.58
#FFFFFF	17.58	1.00	21.00	1.00
#000000	1.19	21.00	1.00	21.00
##FFFFFF	17.58	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001C41

Deuteranopia (green-blind)

#00173F

Tritanopia (blue-blind)

#002028

Achromatopsia (no color)

#191919

Design tokens & code

CSS

--color: #0a1540;
/* rgb */ color: rgb(10, 21, 64);
/* oklch */ color: oklch(21.8% 0.083 267.8);

Tailwind

colors: {
  custom: {
    50: '#535175',
    500: '#0a1540',
    950: '#000000',
  },
}

SCSS

$custom: #0a1540;
$custom-light: #535175;
$custom-dark: #000000;

JSON

{
  "hex": "#0a1540",
  "rgb": {
    "r": 10,
    "g": 21,
    "b": 64
  },
  "hsl": {
    "h": 227.778,
    "s": 72.973,
    "l": 14.51
  },
  "oklch": {
    "l": 0.21845,
    "c": 0.08319,
    "h": 267.8
  },
  "luminance": 0.00971
}

Semantic roles & 50–950 ramp

primary

#0A1540

secondary

#7D6C29

accent

#CA38F0

background

#F5F4F7

surface

#E8E7ED

border

#C4C3C8

text

#030208

muted

#78787B

Preview Lab

Preview with #0A1540

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

Preview Lab → · Contrast checker → · Palette generator →