#0A3F4D#0A3F4D

#0A3F4D is a dark, muted cyan. Relative luminance 0.042; OKLCH L 34.2% C 0.057 H 220.4°. Best body text is #FFFFFF at 11.47:1 contrast (WCAG AA passes).

Color values

HEX	#0A3F4D
RGB	rgb(10, 63, 77)
HSL	hsl(193, 77%, 17%)
HSV	hsv(193, 87%, 30%)
CMYK	cmyk(87%, 18.2%, 0%, 69.8%)
CIE-LAB	lab(24.18, -11.03, -13.26)
CIE-LCH	lch(24.18, 17.25, 230.25°)
OKLab	oklab(34.19% -0.0436 -0.0371)
OKLCH	oklch(34.19% 0.057 220.4)
XYZ	xyz(3.2417, 4.1550, 7.6509)
Luminance	0.0415 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#0A3F4D #4D180A

analogous

#0A4D3A #0A3F4D #0A1E4D

triadic

#0A3F4D #4D0A3F #3F4D0A

tetradic

#0A3F4D #3A0A4D #4D180A #1E4D0A

square

#0A3F4D #3A0A4D #4D180A #1E4D0A

split-complementary

#0A3F4D #4D0A1E #4D3A0A

monochromatic

#04161B #04161B #0A3F4D #116B83 #1898B9

Accessibility & contrast

On white

11.47

#0A3F4D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.83

#0A3F4D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #0A3F4D

11.47:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##0A3F4D	#FFFFFF	#000000	##FFFFFF
##0A3F4D	1.00	11.47	1.83	11.47
#FFFFFF	11.47	1.00	21.00	1.00
#000000	1.83	21.00	1.00	21.00
##FFFFFF	11.47	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#373D4E

Deuteranopia (green-blind)

#2E374D

Tritanopia (blue-blind)

#004443

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #0a3f4d;
/* rgb */ color: rgb(10, 63, 77);
/* oklch */ color: oklch(34.2% 0.057 220.4);

Tailwind

colors: {
  custom: {
    50: '#57747e',
    500: '#0a3f4d',
    950: '#000000',
  },
}

SCSS

$custom: #0a3f4d;
$custom-light: #57747e;
$custom-dark: #000000;

JSON

{
  "hex": "#0a3f4d",
  "rgb": {
    "r": 10,
    "g": 63,
    "b": 77
  },
  "hsl": {
    "h": 192.537,
    "s": 77.011,
    "l": 17.059
  },
  "oklch": {
    "l": 0.34186,
    "c": 0.05725,
    "h": 220.4
  },
  "luminance": 0.04155
}

Semantic roles & 50–950 ramp

primary

#0A3F4D

secondary

#8A3D29

accent

#5C34F4

background

#F5F7F7

surface

#E9EDEE

border

#C5C8C9

text

#04080A

muted

#797B7C

Preview Lab

Preview with #0A3F4D

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

Preview Lab → · Contrast checker → · Palette generator →