#0A023B#0A023B

#0A023B is a very dark, moderate blue. Relative luminance 0.004; OKLCH L 17.4% C 0.102 H 276.2°. Best body text is #FFFFFF at 19.36:1 contrast (WCAG AA passes).

Color values

HEX	#0A023B
RGB	rgb(10, 2, 59)
HSL	hsl(248, 93%, 12%)
HSV	hsv(248, 97%, 23%)
CMYK	cmyk(83.1%, 96.6%, 0%, 76.9%)
CIE-LAB	lab(3.83, 21.71, -33.23)
CIE-LCH	lch(3.83, 39.69, 303.16°)
OKLab	oklab(17.39% 0.011 -0.1012)
OKLCH	oklch(17.39% 0.102 276.2)
XYZ	xyz(0.9360, 0.4236, 4.1693)
Luminance	0.0042 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#0A023B #333B02

analogous

#02173B #0A023B #27023B

triadic

#0A023B #3B0A02 #023B0A

tetradic

#0A023B #3B0217 #333B02 #023B27

square

#0A023B #3B0217 #333B02 #023B27

split-complementary

#0A023B #3B2702 #173B02

monochromatic

#05011E #05011E #0A023B #140476 #1E06B1

Accessibility & contrast

On white

19.36

#0A023B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.08

#0A023B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #0A023B

19.36:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##0A023B	#FFFFFF	#000000	##FFFFFF
##0A023B	1.00	19.36	1.08	19.36
#FFFFFF	19.36	1.00	21.00	1.00
#000000	1.08	21.00	1.00	21.00
##FFFFFF	19.36	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00103D

Deuteranopia (green-blind)

#000B3A

Tritanopia (blue-blind)

#00141F

Achromatopsia (no color)

#0E0E0E

Design tokens & code

CSS

--color: #0a023b;
/* rgb */ color: rgb(10, 2, 59);
/* oklch */ color: oklch(17.4% 0.102 276.2);

Tailwind

colors: {
  custom: {
    50: '#524672',
    500: '#0a023b',
    950: '#000000',
  },
}

SCSS

$custom: #0a023b;
$custom-light: #524672;
$custom-dark: #000000;

JSON

{
  "hex": "#0a023b",
  "rgb": {
    "r": 10,
    "g": 2,
    "b": 59
  },
  "hsl": {
    "h": 248.421,
    "s": 93.443,
    "l": 11.961
  },
  "oklch": {
    "l": 0.17389,
    "c": 0.10182,
    "h": 276.2
  },
  "luminance": 0.00424
}

Semantic roles & 50–950 ramp

primary

#0A023B

secondary

#707E1A

accent

#FF29E1

background

#F4F3F6

surface

#E7E5EC

border

#C3C1C7

text

#030008

muted

#78777B

Preview Lab

Preview with #0A023B

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

Preview Lab → · Contrast checker → · Palette generator →