#173A64#173A64

#173A64 is a dark, moderate cyan. Relative luminance 0.041; OKLCH L 34.6% C 0.084 H 254.7°. Best body text is #FFFFFF at 11.50:1 contrast (WCAG AA passes).

Color values

HEX	#173A64
RGB	rgb(23, 58, 100)
HSL	hsl(213, 63%, 24%)
HSV	hsv(213, 77%, 39%)
CMYK	cmyk(77%, 42%, 0%, 60.8%)
CIE-LAB	lab(24.09, 3.49, -28.42)
CIE-LCH	lch(24.09, 28.63, 276.99°)
OKLab	oklab(34.63% -0.0222 -0.0811)
OKLCH	oklch(34.63% 0.084 254.7)
XYZ	xyz(4.1658, 4.1279, 12.6313)
Luminance	0.0413 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173A64 #644117

analogous

#176164 #173A64 #1A1764

triadic

#173A64 #64173A #3A6417

tetradic

#173A64 #641761 #644117 #17641A

square

#173A64 #641761 #644117 #17641A

split-complementary

#173A64 #641A17 #616417

monochromatic

#060E19 #0C1D32 #173A64 #225796 #2E74C8

Accessibility & contrast

On white

11.50

#173A64 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.83

#173A64 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173A64

11.50:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173A64	#FFFFFF	#000000	##FFFFFF
##173A64	1.00	11.50	1.83	11.50
#FFFFFF	11.50	1.00	21.00	1.00
#000000	1.83	21.00	1.00	21.00
##FFFFFF	11.50	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#263D66

Deuteranopia (green-blind)

#1A3663

Tritanopia (blue-blind)

#00444A

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #173a64;
/* rgb */ color: rgb(23, 58, 100);
/* oklch */ color: oklch(34.6% 0.084 254.7);

Tailwind

colors: {
  custom: {
    50: '#5f6f90',
    500: '#173a64',
    950: '#000000',
  },
}

SCSS

$custom: #173a64;
$custom-light: #5f6f90;
$custom-dark: #000000;

JSON

{
  "hex": "#173a64",
  "rgb": {
    "r": 23,
    "g": 58,
    "b": 100
  },
  "hsl": {
    "h": 212.727,
    "s": 62.602,
    "l": 24.118
  },
  "oklch": {
    "l": 0.34633,
    "c": 0.08404,
    "h": 254.7
  },
  "luminance": 0.04128
}

Semantic roles & 50–950 ramp

primary

#173A64

secondary

#9A703C

accent

#9B42E6

background

#F5F6F8

surface

#EAECF0

border

#C6C7CB

text

#05070C

muted

#797A7D

Preview Lab

Preview with #173A64

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

Preview Lab → · Contrast checker → · Palette generator →