#0A3440#0A3440

#0A3440 is a dark, muted cyan. Relative luminance 0.029; OKLCH L 30.3% C 0.049 H 221.3°. Best body text is #FFFFFF at 13.31:1 contrast (WCAG AA passes).

Color values

HEX	#0A3440
RGB	rgb(10, 52, 64)
HSL	hsl(193, 73%, 15%)
HSV	hsv(193, 84%, 25%)
CMYK	cmyk(84.4%, 18.8%, 0%, 74.9%)
CIE-LAB	lab(19.60, -9.28, -11.59)
CIE-LCH	lch(19.60, 14.85, 231.30°)
OKLab	oklab(30.31% -0.0369 -0.0324)
OKLCH	oklch(30.31% 0.049 221.3)
XYZ	xyz(2.2782, 2.8904, 5.2873)
Luminance	0.0289 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#0A3440 #40160A

analogous

#0A4031 #0A3440 #0A1940

triadic

#0A3440 #400A34 #34400A

tetradic

#0A3440 #310A40 #40160A #19400A

square

#0A3440 #310A40 #40160A #19400A

split-complementary

#0A3440 #400A19 #40310A

monochromatic

#04161A #04161A #0A3440 #125F75 #1B8AAA

Accessibility & contrast

On white

13.31

#0A3440 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.58

#0A3440 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #0A3440

13.31:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##0A3440	#FFFFFF	#000000	##FFFFFF
##0A3440	1.00	13.31	1.58	13.31
#FFFFFF	13.31	1.00	21.00	1.00
#000000	1.58	21.00	1.00	21.00
##FFFFFF	13.31	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2D3241

Deuteranopia (green-blind)

#262D40

Tritanopia (blue-blind)

#003838

Achromatopsia (no color)

#2F2F2F

Design tokens & code

CSS

--color: #0a3440;
/* rgb */ color: rgb(10, 52, 64);
/* oklch */ color: oklch(30.3% 0.049 221.3);

Tailwind

colors: {
  custom: {
    50: '#536b74',
    500: '#0a3440',
    950: '#000000',
  },
}

SCSS

$custom: #0a3440;
$custom-light: #536b74;
$custom-dark: #000000;

JSON

{
  "hex": "#0a3440",
  "rgb": {
    "r": 10,
    "g": 52,
    "b": 64
  },
  "hsl": {
    "h": 193.333,
    "s": 72.973,
    "l": 14.51
  },
  "oklch": {
    "l": 0.30311,
    "c": 0.0491,
    "h": 221.3
  },
  "luminance": 0.02891
}

Semantic roles & 50–950 ramp

primary

#0A3440

secondary

#7D3B29

accent

#6138F0

background

#F5F6F7

surface

#E8EBED

border

#C4C6C8

text

#030608

muted

#787A7B

Preview Lab

Preview with #0A3440

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

Preview Lab → · Contrast checker → · Palette generator →