#0A3F4E#0A3F4E

#0A3F4E is a dark, muted cyan. Relative luminance 0.042; OKLCH L 34.2% C 0.058 H 222.0°. Best body text is #FFFFFF at 11.45:1 contrast (WCAG AA passes).

Color values

HEX	#0A3F4E
RGB	rgb(10, 63, 78)
HSL	hsl(193, 77%, 17%)
HSV	hsv(193, 87%, 31%)
CMYK	cmyk(87.2%, 19.2%, 0%, 69.4%)
CIE-LAB	lab(24.22, -10.64, -13.85)
CIE-LCH	lch(24.22, 17.46, 232.47°)
OKLab	oklab(34.24% -0.0431 -0.0388)
OKLCH	oklch(34.24% 0.058 222)
XYZ	xyz(3.2772, 4.1692, 7.8383)
Luminance	0.0417 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#0A3F4E #4E190A

analogous

#0A4E3B #0A3F4E #0A1D4E

triadic

#0A3F4E #4E0A3F #3F4E0A

tetradic

#0A3F4E #3B0A4E #4E190A #1D4E0A

square

#0A3F4E #3B0A4E #4E190A #1D4E0A

split-complementary

#0A3F4E #4E0A1D #4E3B0A

monochromatic

#03161B #03161B #0A3F4E #116B84 #1897BA

Accessibility & contrast

On white

11.45

#0A3F4E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.83

#0A3F4E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #0A3F4E

11.45:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##0A3F4E	#FFFFFF	#000000	##FFFFFF
##0A3F4E	1.00	11.45	1.83	11.45
#FFFFFF	11.45	1.00	21.00	1.00
#000000	1.83	21.00	1.00	21.00
##FFFFFF	11.45	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#363D4F

Deuteranopia (green-blind)

#2D374E

Tritanopia (blue-blind)

#004444

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #0a3f4e;
/* rgb */ color: rgb(10, 63, 78);
/* oklch */ color: oklch(34.2% 0.058 222.0);

Tailwind

colors: {
  custom: {
    50: '#57747f',
    500: '#0a3f4e',
    950: '#000000',
  },
}

SCSS

$custom: #0a3f4e;
$custom-light: #57747f;
$custom-dark: #000000;

JSON

{
  "hex": "#0a3f4e",
  "rgb": {
    "r": 10,
    "g": 63,
    "b": 78
  },
  "hsl": {
    "h": 193.235,
    "s": 77.273,
    "l": 17.255
  },
  "oklch": {
    "l": 0.34238,
    "c": 0.05801,
    "h": 222
  },
  "luminance": 0.0417
}

Semantic roles & 50–950 ramp

primary

#0A3F4E

secondary

#8B3F29

accent

#5E34F4

background

#F5F7F7

surface

#E9EDEE

border

#C5C8C9

text

#04080A

muted

#797B7C

Preview Lab

Preview with #0A3F4E

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

Preview Lab → · Contrast checker → · Palette generator →