#0A0440#0A0440

#0A0440 is a very dark, moderate blue. Relative luminance 0.005; OKLCH L 18.5% C 0.106 H 274.3°. Best body text is #FFFFFF at 19.01:1 contrast (WCAG AA passes).

Color values

HEX	#0A0440
RGB	rgb(10, 4, 64)
HSL	hsl(246, 88%, 13%)
HSV	hsv(246, 94%, 25%)
CMYK	cmyk(84.4%, 93.8%, 0%, 74.9%)
CIE-LAB	lab(4.71, 23.62, -35.40)
CIE-LCH	lch(4.71, 42.55, 303.71°)
OKLab	oklab(18.52% 0.0079 -0.1053)
OKLCH	oklch(18.52% 0.106 274.3)
XYZ	xyz(1.0937, 0.5214, 4.8925)
Luminance	0.0052 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Night Blue

#040348

ΔE00 2.05

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#0A0440 #3A4004

analogous

#041C40 #0A0440 #280440

triadic

#0A0440 #400A04 #04400A

tetradic

#0A0440 #40041C #3A4004 #044028

square

#0A0440 #40041C #3A4004 #044028

split-complementary

#0A0440 #402804 #1C4004

monochromatic

#05021D #05021D #0A0440 #13087A #1C0BB3

Accessibility & contrast

On white

19.01

#0A0440 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.10

#0A0440 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #0A0440

19.01:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##0A0440	#FFFFFF	#000000	##FFFFFF
##0A0440	1.00	19.01	1.10	19.01
#FFFFFF	19.01	1.00	21.00	1.00
#000000	1.10	21.00	1.00	21.00
##FFFFFF	19.01	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001342

Deuteranopia (green-blind)

#000D3F

Tritanopia (blue-blind)

#001723

Achromatopsia (no color)

#101010

Design tokens & code

CSS

--color: #0a0440;
/* rgb */ color: rgb(10, 4, 64);
/* oklch */ color: oklch(18.5% 0.106 274.3);

Tailwind

colors: {
  custom: {
    50: '#544776',
    500: '#0a0440',
    950: '#000000',
  },
}

SCSS

$custom: #0a0440;
$custom-light: #544776;
$custom-dark: #000000;

JSON

{
  "hex": "#0a0440",
  "rgb": {
    "r": 10,
    "g": 4,
    "b": 64
  },
  "hsl": {
    "h": 246,
    "s": 88.235,
    "l": 13.333
  },
  "oklch": {
    "l": 0.18518,
    "c": 0.10558,
    "h": 274.3
  },
  "luminance": 0.00522
}

Semantic roles & 50–950 ramp

primary

#0A0440

secondary

#77811F

accent

#FE29E9

background

#F5F4F7

surface

#E9E6ED

border

#C5C2C8

text

#030008

muted

#78777B

Preview Lab

Preview with #0A0440

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

Preview Lab → · Contrast checker → · Palette generator →