#0A283A#0A283A

#0A283A is a dark, muted cyan. Relative luminance 0.019; OKLCH L 26.4% C 0.049 H 239.0°. Best body text is #FFFFFF at 15.24:1 contrast (WCAG AA passes).

Color values

HEX	#0A283A
RGB	rgb(10, 40, 58)
HSL	hsl(203, 71%, 13%)
HSV	hsv(203, 83%, 23%)
CMYK	cmyk(82.8%, 31%, 0%, 77.3%)
CIE-LAB	lab(14.88, -3.73, -14.75)
CIE-LCH	lch(14.88, 15.21, 255.82°)
OKLab	oklab(26.45% -0.025 -0.0416)
OKLCH	oklch(26.45% 0.049 239)
XYZ	xyz(1.6474, 1.8874, 4.2797)
Luminance	0.0189 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#0A283A #3A1C0A

analogous

#0A3A34 #0A283A #0A103A

triadic

#0A283A #3A0A28 #283A0A

tetradic

#0A283A #340A3A #3A1C0A #103A0A

square

#0A283A #340A3A #3A1C0A #103A0A

split-complementary

#0A283A #3A0A10 #3A340A

monochromatic

#05121A #05121A #0A283A #134C6E #1C70A2

Accessibility & contrast

On white

15.24

#0A283A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.38

#0A283A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #0A283A

15.24:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##0A283A	#FFFFFF	#000000	##FFFFFF
##0A283A	1.00	15.24	1.38	15.24
#FFFFFF	15.24	1.00	21.00	1.00
#000000	1.38	21.00	1.00	21.00
##FFFFFF	15.24	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#20283B

Deuteranopia (green-blind)

#19233A

Tritanopia (blue-blind)

#002D2E

Achromatopsia (no color)

#252525

Design tokens & code

CSS

--color: #0a283a;
/* rgb */ color: rgb(10, 40, 58);
/* oklch */ color: oklch(26.4% 0.049 239.0);

Tailwind

colors: {
  custom: {
    50: '#516170',
    500: '#0a283a',
    950: '#000000',
  },
}

SCSS

$custom: #0a283a;
$custom-light: #516170;
$custom-dark: #000000;

JSON

{
  "hex": "#0a283a",
  "rgb": {
    "r": 10,
    "g": 40,
    "b": 58
  },
  "hsl": {
    "h": 202.5,
    "s": 70.588,
    "l": 13.333
  },
  "oklch": {
    "l": 0.26446,
    "c": 0.04855,
    "h": 239
  },
  "luminance": 0.01888
}

Semantic roles & 50–950 ramp

primary

#0A283A

secondary

#774628

accent

#7E3AED

background

#F4F5F6

surface

#E7E9EC

border

#C3C5C7

text

#020507

muted

#78797A

Preview Lab

Preview with #0A283A

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

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