#0A283B#0A283B

#0A283B is a dark, muted cyan. Relative luminance 0.019; OKLCH L 26.5% C 0.050 H 240.4°. Best body text is #FFFFFF at 15.22:1 contrast (WCAG AA passes).

Color values

HEX	#0A283B
RGB	rgb(10, 40, 59)
HSL	hsl(203, 71%, 14%)
HSV	hsv(203, 83%, 23%)
CMYK	cmyk(83.1%, 32.2%, 0%, 76.9%)
CIE-LAB	lab(14.94, -3.30, -15.36)
CIE-LCH	lch(14.94, 15.71, 257.88°)
OKLab	oklab(26.51% -0.0246 -0.0434)
OKLCH	oklch(26.51% 0.05 240.4)
XYZ	xyz(1.6731, 1.8977, 4.4149)
Luminance	0.0190 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#0A283B #3B1D0A

analogous

#0A3B35 #0A283B #0A0F3B

triadic

#0A283B #3B0A28 #283B0A

tetradic

#0A283B #350A3B #3B1D0A #0F3B0A

square

#0A283B #350A3B #3B1D0A #0F3B0A

split-complementary

#0A283B #3B0A0F #3B350A

monochromatic

#04121A #04121A #0A283B #134B6F #1C6FA4

Accessibility & contrast

On white

15.22

#0A283B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.38

#0A283B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #0A283B

15.22:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##0A283B	#FFFFFF	#000000	##FFFFFF
##0A283B	1.00	15.22	1.38	15.22
#FFFFFF	15.22	1.00	21.00	1.00
#000000	1.38	21.00	1.00	21.00
##FFFFFF	15.22	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1F283C

Deuteranopia (green-blind)

#18233B

Tritanopia (blue-blind)

#002D2F

Achromatopsia (no color)

#262626

Design tokens & code

CSS

--color: #0a283b;
/* rgb */ color: rgb(10, 40, 59);
/* oklch */ color: oklch(26.5% 0.050 240.4);

Tailwind

colors: {
  custom: {
    50: '#516171',
    500: '#0a283b',
    950: '#000000',
  },
}

SCSS

$custom: #0a283b;
$custom-light: #516171;
$custom-dark: #000000;

JSON

{
  "hex": "#0a283b",
  "rgb": {
    "r": 10,
    "g": 40,
    "b": 59
  },
  "hsl": {
    "h": 203.265,
    "s": 71.014,
    "l": 13.529
  },
  "oklch": {
    "l": 0.26509,
    "c": 0.04988,
    "h": 240.4
  },
  "luminance": 0.01898
}

Semantic roles & 50–950 ramp

primary

#0A283B

secondary

#784728

accent

#803AEE

background

#F4F5F6

surface

#E7E9EC

border

#C3C5C7

text

#020507

muted

#78797A

Preview Lab

Preview with #0A283B

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

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