#173A63#173A63

#173A63 is a dark, moderate cyan. Relative luminance 0.041; OKLCH L 34.6% C 0.083 H 254.2°. Best body text is #FFFFFF at 11.53:1 contrast (WCAG AA passes).

Color values

HEX	#173A63
RGB	rgb(23, 58, 99)
HSL	hsl(212, 62%, 24%)
HSV	hsv(212, 77%, 39%)
CMYK	cmyk(76.8%, 41.4%, 0%, 61.2%)
CIE-LAB	lab(24.03, 3.07, -27.87)
CIE-LCH	lch(24.03, 28.04, 276.29°)
OKLab	oklab(34.56% -0.0224 -0.0795)
OKLCH	oklch(34.56% 0.083 254.2)
XYZ	xyz(4.1177, 4.1087, 12.3780)
Luminance	0.0411 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173A63 #634017

analogous

#176063 #173A63 #1A1763

triadic

#173A63 #63173A #3A6317

tetradic

#173A63 #631760 #634017 #17631A

square

#173A63 #631760 #634017 #17631A

split-complementary

#173A63 #631A17 #606317

monochromatic

#060F19 #0B1D31 #173A63 #235795 #2E74C6

Accessibility & contrast

On white

11.53

#173A63 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.82

#173A63 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173A63

11.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173A63	#FFFFFF	#000000	##FFFFFF
##173A63	1.00	11.53	1.82	11.53
#FFFFFF	11.53	1.00	21.00	1.00
#000000	1.82	21.00	1.00	21.00
##FFFFFF	11.53	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#273D65

Deuteranopia (green-blind)

#1B3662

Tritanopia (blue-blind)

#004449

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #173a63;
/* rgb */ color: rgb(23, 58, 99);
/* oklch */ color: oklch(34.6% 0.083 254.2);

Tailwind

colors: {
  custom: {
    50: '#5f6f8f',
    500: '#173a63',
    950: '#000000',
  },
}

SCSS

$custom: #173a63;
$custom-light: #5f6f8f;
$custom-dark: #000000;

JSON

{
  "hex": "#173a63",
  "rgb": {
    "r": 23,
    "g": 58,
    "b": 99
  },
  "hsl": {
    "h": 212.368,
    "s": 62.295,
    "l": 23.922
  },
  "oklch": {
    "l": 0.34564,
    "c": 0.08256,
    "h": 254.2
  },
  "luminance": 0.04109
}

Semantic roles & 50–950 ramp

primary

#173A63

secondary

#9A6F3C

accent

#9A42E5

background

#F5F6F8

surface

#EAECF0

border

#C6C7CB

text

#05070C

muted

#797A7D

Preview Lab

Preview with #173A63

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

Preview Lab → · Contrast checker → · Palette generator →