#173C64#173C64

#173C64 is a dark, moderate cyan. Relative luminance 0.043; OKLCH L 35.1% C 0.082 H 252.7°. Best body text is #FFFFFF at 11.25:1 contrast (WCAG AA passes).

Color values

HEX	#173C64
RGB	rgb(23, 60, 100)
HSL	hsl(211, 63%, 24%)
HSV	hsv(211, 77%, 39%)
CMYK	cmyk(77%, 40%, 0%, 60.8%)
CIE-LAB	lab(24.74, 2.10, -27.38)
CIE-LCH	lch(24.74, 27.46, 274.39°)
OKLab	oklab(35.14% -0.0243 -0.078)
OKLCH	oklch(35.14% 0.082 252.7)
XYZ	xyz(4.2686, 4.3335, 12.6656)
Luminance	0.0433 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173C64 #643F17

analogous

#176364 #173C64 #191764

triadic

#173C64 #64173C #3C6417

tetradic

#173C64 #641763 #643F17 #176419

square

#173C64 #641763 #643F17 #176419

split-complementary

#173C64 #641917 #636417

monochromatic

#060F19 #0C1E32 #173C64 #225A96 #2E78C8

Accessibility & contrast

On white

11.25

#173C64 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.87

#173C64 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173C64

11.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173C64	#FFFFFF	#000000	##FFFFFF
##173C64	1.00	11.25	1.87	11.25
#FFFFFF	11.25	1.00	21.00	1.00
#000000	1.87	21.00	1.00	21.00
##FFFFFF	11.25	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2A3F66

Deuteranopia (green-blind)

#1E3763

Tritanopia (blue-blind)

#00454B

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #173c64;
/* rgb */ color: rgb(23, 60, 100);
/* oklch */ color: oklch(35.1% 0.082 252.7);

Tailwind

colors: {
  custom: {
    50: '#5f7190',
    500: '#173c64',
    950: '#000000',
  },
}

SCSS

$custom: #173c64;
$custom-light: #5f7190;
$custom-dark: #000000;

JSON

{
  "hex": "#173c64",
  "rgb": {
    "r": 23,
    "g": 60,
    "b": 100
  },
  "hsl": {
    "h": 211.169,
    "s": 62.602,
    "l": 24.118
  },
  "oklch": {
    "l": 0.35144,
    "c": 0.08167,
    "h": 252.7
  },
  "luminance": 0.04334
}

Semantic roles & 50–950 ramp

primary

#173C64

secondary

#9A6D3C

accent

#9742E6

background

#F5F6F8

surface

#EAECF0

border

#C6C7CB

text

#05070C

muted

#797A7D

Preview Lab

Preview with #173C64

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

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