#0B283B#0B283B

#0B283B is a dark, muted cyan. Relative luminance 0.019; OKLCH L 26.5% C 0.049 H 241.0°. Best body text is #FFFFFF at 15.21:1 contrast (WCAG AA passes).

Color values

HEX	#0B283B
RGB	rgb(11, 40, 59)
HSL	hsl(204, 69%, 14%)
HSV	hsv(204, 81%, 23%)
CMYK	cmyk(81.4%, 32.2%, 0%, 76.9%)
CIE-LAB	lab(14.98, -3.12, -15.30)
CIE-LCH	lch(14.98, 15.62, 258.46°)
OKLab	oklab(26.55% -0.0239 -0.0432)
OKLCH	oklch(26.55% 0.049 241)
XYZ	xyz(1.6859, 1.9043, 4.4155)
Luminance	0.0190 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#0B283B #3B1E0B

analogous

#0B3B36 #0B283B #0B103B

triadic

#0B283B #3B0B28 #283B0B

tetradic

#0B283B #360B3B #3B1E0B #103B0B

square

#0B283B #360B3B #3B1E0B #103B0B

split-complementary

#0B283B #3B0B10 #3B360B

monochromatic

#05111A #05111A #0B283B #154B6F #1E6EA2

Accessibility & contrast

On white

15.21

#0B283B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.38

#0B283B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #0B283B

15.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##0B283B	#FFFFFF	#000000	##FFFFFF
##0B283B	1.00	15.21	1.38	15.21
#FFFFFF	15.21	1.00	21.00	1.00
#000000	1.38	21.00	1.00	21.00
##FFFFFF	15.21	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1F283C

Deuteranopia (green-blind)

#19243B

Tritanopia (blue-blind)

#002D2F

Achromatopsia (no color)

#262626

Design tokens & code

CSS

--color: #0b283b;
/* rgb */ color: rgb(11, 40, 59);
/* oklch */ color: oklch(26.5% 0.049 241.0);

Tailwind

colors: {
  custom: {
    50: '#516171',
    500: '#0b283b',
    950: '#000000',
  },
}

SCSS

$custom: #0b283b;
$custom-light: #516171;
$custom-dark: #000000;

JSON

{
  "hex": "#0b283b",
  "rgb": {
    "r": 11,
    "g": 40,
    "b": 59
  },
  "hsl": {
    "h": 203.75,
    "s": 68.571,
    "l": 13.725
  },
  "oklch": {
    "l": 0.26548,
    "c": 0.04938,
    "h": 241
  },
  "luminance": 0.01904
}

Semantic roles & 50–950 ramp

primary

#0B283B

secondary

#78492A

accent

#823CEB

background

#F4F5F6

surface

#E7E9EC

border

#C3C5C7

text

#020507

muted

#78797A

Preview Lab

Preview with #0B283B

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

Preview Lab → · Contrast checker → · Palette generator →