#0A033B#0A033B

#0A033B is a very dark, moderate blue. Relative luminance 0.004; OKLCH L 17.6% C 0.100 H 275.9°. Best body text is #FFFFFF at 19.28:1 contrast (WCAG AA passes).

Color values

HEX	#0A033B
RGB	rgb(10, 3, 59)
HSL	hsl(248, 90%, 12%)
HSV	hsv(248, 95%, 23%)
CMYK	cmyk(83.1%, 94.9%, 0%, 76.9%)
CIE-LAB	lab(4.02, 21.28, -32.91)
CIE-LCH	lch(4.02, 39.19, 302.89°)
OKLab	oklab(17.6% 0.0103 -0.0997)
OKLCH	oklch(17.6% 0.1 275.9)
XYZ	xyz(0.9469, 0.4453, 4.1729)
Luminance	0.0044 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#0A033B #343B03

analogous

#03183B #0A033B #26033B

triadic

#0A033B #3B0A03 #033B0A

tetradic

#0A033B #3B0318 #343B03 #033B26

square

#0A033B #3B0318 #343B03 #033B26

split-complementary

#0A033B #3B2603 #183B03

monochromatic

#05011D #05011D #0A033B #140675 #1E09AF

Accessibility & contrast

On white

19.28

#0A033B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.09

#0A033B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #0A033B

19.28:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##0A033B	#FFFFFF	#000000	##FFFFFF
##0A033B	1.00	19.28	1.09	19.28
#FFFFFF	19.28	1.00	21.00	1.00
#000000	1.09	21.00	1.00	21.00
##FFFFFF	19.28	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00113D

Deuteranopia (green-blind)

#000C3A

Tritanopia (blue-blind)

#00141F

Achromatopsia (no color)

#0E0E0E

Design tokens & code

CSS

--color: #0a033b;
/* rgb */ color: rgb(10, 3, 59);
/* oklch */ color: oklch(17.6% 0.100 275.9);

Tailwind

colors: {
  custom: {
    50: '#524772',
    500: '#0a033b',
    950: '#000000',
  },
}

SCSS

$custom: #0a033b;
$custom-light: #524772;
$custom-dark: #000000;

JSON

{
  "hex": "#0a033b",
  "rgb": {
    "r": 10,
    "g": 3,
    "b": 59
  },
  "hsl": {
    "h": 247.5,
    "s": 90.323,
    "l": 12.157
  },
  "oklch": {
    "l": 0.17603,
    "c": 0.10028,
    "h": 275.9
  },
  "luminance": 0.00445
}

Semantic roles & 50–950 ramp

primary

#0A033B

secondary

#717E1C

accent

#FF29E4

background

#F4F3F6

surface

#E7E5EC

border

#C3C1C7

text

#030008

muted

#78777B

Preview Lab

Preview with #0A033B

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

Preview Lab → · Contrast checker → · Palette generator →