#0A0340#0A0340

#0A0340 is a very dark, moderate blue. Relative luminance 0.005; OKLCH L 18.3% C 0.107 H 274.5°. Best body text is #FFFFFF at 19.09:1 contrast (WCAG AA passes).

Color values

HEX	#0A0340
RGB	rgb(10, 3, 64)
HSL	hsl(247, 91%, 13%)
HSV	hsv(247, 95%, 25%)
CMYK	cmyk(84.4%, 95.3%, 0%, 74.9%)
CIE-LAB	lab(4.51, 24.08, -35.72)
CIE-LCH	lch(4.51, 43.08, 303.99°)
OKLab	oklab(18.33% 0.0084 -0.1066)
OKLCH	oklch(18.33% 0.107 274.5)
XYZ	xyz(1.0828, 0.4997, 4.8889)
Luminance	0.0050 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Night Blue

#040348

ΔE00 1.92

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#0A0340 #394003

analogous

#031A40 #0A0340 #280340

triadic

#0A0340 #400A03 #03400A

tetradic

#0A0340 #40031A #394003 #034028

square

#0A0340 #40031A #394003 #034028

split-complementary

#0A0340 #402803 #1A4003

monochromatic

#05011D #05011D #0A0340 #13067A #1C08B5

Accessibility & contrast

On white

19.09

#0A0340 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.10

#0A0340 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #0A0340

19.09:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##0A0340	#FFFFFF	#000000	##FFFFFF
##0A0340	1.00	19.09	1.10	19.09
#FFFFFF	19.09	1.00	21.00	1.00
#000000	1.10	21.00	1.00	21.00
##FFFFFF	19.09	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001242

Deuteranopia (green-blind)

#000D3F

Tritanopia (blue-blind)

#001622

Achromatopsia (no color)

#101010

Design tokens & code

CSS

--color: #0a0340;
/* rgb */ color: rgb(10, 3, 64);
/* oklch */ color: oklch(18.3% 0.107 274.5);

Tailwind

colors: {
  custom: {
    50: '#544676',
    500: '#0a0340',
    950: '#000000',
  },
}

SCSS

$custom: #0a0340;
$custom-light: #544676;
$custom-dark: #000000;

JSON

{
  "hex": "#0a0340",
  "rgb": {
    "r": 10,
    "g": 3,
    "b": 64
  },
  "hsl": {
    "h": 246.885,
    "s": 91.045,
    "l": 13.137
  },
  "oklch": {
    "l": 0.18325,
    "c": 0.10694,
    "h": 274.5
  },
  "luminance": 0.005
}

Semantic roles & 50–950 ramp

primary

#0A0340

secondary

#76821D

accent

#FF29E6

background

#F5F3F7

surface

#E9E5ED

border

#C5C1C8

text

#030008

muted

#78777B

Preview Lab

Preview with #0A0340

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

Preview Lab → · Contrast checker → · Palette generator →