#173D5B#173D5B

#173D5B is a dark, moderate cyan. Relative luminance 0.043; OKLCH L 34.8% C 0.068 H 245.4°. Best body text is #FFFFFF at 11.32:1 contrast (WCAG AA passes).

Color values

HEX	#173D5B
RGB	rgb(23, 61, 91)
HSL	hsl(206, 60%, 22%)
HSV	hsv(206, 75%, 36%)
CMYK	cmyk(74.7%, 33%, 0%, 64.3%)
CIE-LAB	lab(24.56, -2.23, -21.83)
CIE-LCH	lch(24.56, 21.94, 264.18°)
OKLab	oklab(34.83% -0.0282 -0.0617)
OKLCH	oklch(34.83% 0.068 245.4)
XYZ	xyz(3.9097, 4.2746, 10.5145)
Luminance	0.0428 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173D5B #5B3517

analogous

#175B57 #173D5B #171B5B

triadic

#173D5B #5B173D #3D5B17

tetradic

#173D5B #57175B #5B3517 #1B5B17

square

#173D5B #57175B #5B3517 #1B5B17

split-complementary

#173D5B #5B171B #5B5717

monochromatic

#061018 #0B1C2A #173D5B #235E8C #307EBD

Accessibility & contrast

On white

11.32

#173D5B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.86

#173D5B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173D5B

11.32:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173D5B	#FFFFFF	#000000	##FFFFFF
##173D5B	1.00	11.32	1.86	11.32
#FFFFFF	11.32	1.00	21.00	1.00
#000000	1.86	21.00	1.00	21.00
##FFFFFF	11.32	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#303E5C

Deuteranopia (green-blind)

#26375A

Tritanopia (blue-blind)

#004448

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #173d5b;
/* rgb */ color: rgb(23, 61, 91);
/* oklch */ color: oklch(34.8% 0.068 245.4);

Tailwind

colors: {
  custom: {
    50: '#5e7289',
    500: '#173d5b',
    950: '#000000',
  },
}

SCSS

$custom: #173d5b;
$custom-light: #5e7289;
$custom-dark: #000000;

JSON

{
  "hex": "#173d5b",
  "rgb": {
    "r": 23,
    "g": 61,
    "b": 91
  },
  "hsl": {
    "h": 206.471,
    "s": 59.649,
    "l": 22.353
  },
  "oklch": {
    "l": 0.34828,
    "c": 0.06788,
    "h": 245.4
  },
  "luminance": 0.04275
}

Semantic roles & 50–950 ramp

primary

#173D5B

secondary

#92623C

accent

#8B45E3

background

#F5F6F8

surface

#E9ECF0

border

#C5C7CB

text

#05070B

muted

#797A7C

Preview Lab

Preview with #173D5B

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

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