#0B283A#0B283A

#0B283A is a dark, muted cyan. Relative luminance 0.019; OKLCH L 26.5% C 0.048 H 239.6°. Best body text is #FFFFFF at 15.23:1 contrast (WCAG AA passes).

Color values

HEX	#0B283A
RGB	rgb(11, 40, 58)
HSL	hsl(203, 68%, 14%)
HSV	hsv(203, 81%, 23%)
CMYK	cmyk(81%, 31%, 0%, 77.3%)
CIE-LAB	lab(14.92, -3.55, -14.69)
CIE-LCH	lch(14.92, 15.11, 256.42°)
OKLab	oklab(26.48% -0.0243 -0.0414)
OKLCH	oklch(26.48% 0.048 239.6)
XYZ	xyz(1.6602, 1.8940, 4.2803)
Luminance	0.0189 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#0B283A #3A1D0B

analogous

#0B3A34 #0B283A #0B103A

triadic

#0B283A #3A0B28 #283A0B

tetradic

#0B283A #340B3A #3A1D0B #103A0B

square

#0B283A #340B3A #3A1D0B #103A0B

split-complementary

#0B283A #3A0B10 #3A340B

monochromatic

#05121A #05121A #0B283A #154B6D #1F6FA1

Accessibility & contrast

On white

15.23

#0B283A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.38

#0B283A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #0B283A

15.23:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##0B283A	#FFFFFF	#000000	##FFFFFF
##0B283A	1.00	15.23	1.38	15.23
#FFFFFF	15.23	1.00	21.00	1.00
#000000	1.38	21.00	1.00	21.00
##FFFFFF	15.23	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#20283B

Deuteranopia (green-blind)

#19233A

Tritanopia (blue-blind)

#002D2E

Achromatopsia (no color)

#262626

Design tokens & code

CSS

--color: #0b283a;
/* rgb */ color: rgb(11, 40, 58);
/* oklch */ color: oklch(26.5% 0.048 239.6);

Tailwind

colors: {
  custom: {
    50: '#516170',
    500: '#0b283a',
    950: '#000000',
  },
}

SCSS

$custom: #0b283a;
$custom-light: #516170;
$custom-dark: #000000;

JSON

{
  "hex": "#0b283a",
  "rgb": {
    "r": 11,
    "g": 40,
    "b": 58
  },
  "hsl": {
    "h": 202.979,
    "s": 68.116,
    "l": 13.529
  },
  "oklch": {
    "l": 0.26485,
    "c": 0.04803,
    "h": 239.6
  },
  "luminance": 0.01894
}

Semantic roles & 50–950 ramp

primary

#0B283A

secondary

#77472A

accent

#803DEB

background

#F4F5F6

surface

#E7E9EC

border

#C3C5C7

text

#020507

muted

#78797A

Preview Lab

Preview with #0B283A

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

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