#0B313B#0B313B

#0B313B is a dark, muted cyan. Relative luminance 0.026; OKLCH L 29.2% C 0.045 H 219.0°. Best body text is #FFFFFF at 13.84:1 contrast (WCAG AA passes).

Color values

HEX	#0B313B
RGB	rgb(11, 49, 59)
HSL	hsl(193, 69%, 14%)
HSV	hsv(193, 81%, 23%)
CMYK	cmyk(81.4%, 16.9%, 0%, 76.9%)
CIE-LAB	lab(18.29, -9.19, -10.17)
CIE-LCH	lch(18.29, 13.71, 227.91°)
OKLab	oklab(29.19% -0.035 -0.0284)
OKLCH	oklch(29.19% 0.045 219)
XYZ	xyz(2.0254, 2.5833, 4.5287)
Luminance	0.0258 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#0B313B #3B150B

analogous

#0B3B2D #0B313B #0B193B

triadic

#0B313B #3B0B31 #313B0B

tetradic

#0B313B #2D0B3B #3B150B #193B0B

square

#0B313B #2D0B3B #3B150B #193B0B

split-complementary

#0B313B #3B0B19 #3B2D0B

monochromatic

#05151A #05151A #0B313B #155C6F #1E87A2

Accessibility & contrast

On white

13.84

#0B313B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.52

#0B313B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #0B313B

13.84:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##0B313B	#FFFFFF	#000000	##FFFFFF
##0B313B	1.00	13.84	1.52	13.84
#FFFFFF	13.84	1.00	21.00	1.00
#000000	1.52	21.00	1.00	21.00
##FFFFFF	13.84	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2B2F3C

Deuteranopia (green-blind)

#242B3B

Tritanopia (blue-blind)

#003434

Achromatopsia (no color)

#2D2D2D

Design tokens & code

CSS

--color: #0b313b;
/* rgb */ color: rgb(11, 49, 59);
/* oklch */ color: oklch(29.2% 0.045 219.0);

Tailwind

colors: {
  custom: {
    50: '#526971',
    500: '#0b313b',
    950: '#000000',
  },
}

SCSS

$custom: #0b313b;
$custom-light: #526971;
$custom-dark: #000000;

JSON

{
  "hex": "#0b313b",
  "rgb": {
    "r": 11,
    "g": 49,
    "b": 59
  },
  "hsl": {
    "h": 192.5,
    "s": 68.571,
    "l": 13.725
  },
  "oklch": {
    "l": 0.29192,
    "c": 0.0451,
    "h": 219
  },
  "luminance": 0.02584
}

Semantic roles & 50–950 ramp

primary

#0B313B

secondary

#783A2A

accent

#613CEB

background

#F4F6F6

surface

#E7EBEC

border

#C3C6C7

text

#020607

muted

#787A7A

Preview Lab

Preview with #0B313B

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

Preview Lab → · Contrast checker → · Palette generator →