#173B5D#173B5D

#173B5D is a dark, moderate cyan. Relative luminance 0.041; OKLCH L 34.4% C 0.073 H 249.6°. Best body text is #FFFFFF at 11.54:1 contrast (WCAG AA passes).

Color values

HEX	#173B5D
RGB	rgb(23, 59, 93)
HSL	hsl(209, 60%, 23%)
HSV	hsv(209, 75%, 36%)
CMYK	cmyk(75.3%, 36.6%, 0%, 63.5%)
CIE-LAB	lab(24.00, -0.07, -24.01)
CIE-LCH	lch(24.00, 24.01, 269.84°)
OKLab	oklab(34.42% -0.0253 -0.0681)
OKLCH	oklch(34.42% 0.073 249.6)
XYZ	xyz(3.8924, 4.1000, 10.9400)
Luminance	0.0410 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173B5D #5D3917

analogous

#175D5C #173B5D #17185D

triadic

#173B5D #5D173B #3B5D17

tetradic

#173B5D #5C175D #5D3917 #185D17

square

#173B5D #5C175D #5D3917 #185D17

split-complementary

#173B5D #5D1718 #5D5C17

monochromatic

#061019 #0B1C2C #173B5D #235A8E #2F79BF

Accessibility & contrast

On white

11.54

#173B5D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.82

#173B5D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173B5D

11.54:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173B5D	#FFFFFF	#000000	##FFFFFF
##173B5D	1.00	11.54	1.82	11.54
#FFFFFF	11.54	1.00	21.00	1.00
#000000	1.82	21.00	1.00	21.00
##FFFFFF	11.54	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2C3D5E

Deuteranopia (green-blind)

#22365C

Tritanopia (blue-blind)

#004347

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #173b5d;
/* rgb */ color: rgb(23, 59, 93);
/* oklch */ color: oklch(34.4% 0.073 249.6);

Tailwind

colors: {
  custom: {
    50: '#5e708b',
    500: '#173b5d',
    950: '#000000',
  },
}

SCSS

$custom: #173b5d;
$custom-light: #5e708b;
$custom-dark: #000000;

JSON

{
  "hex": "#173b5d",
  "rgb": {
    "r": 23,
    "g": 59,
    "b": 93
  },
  "hsl": {
    "h": 209.143,
    "s": 60.345,
    "l": 22.745
  },
  "oklch": {
    "l": 0.34425,
    "c": 0.07268,
    "h": 249.6
  },
  "luminance": 0.041
}

Semantic roles & 50–950 ramp

primary

#173B5D

secondary

#94673C

accent

#9244E3

background

#F5F6F8

surface

#E9ECF0

border

#C5C7CB

text

#05070C

muted

#797A7D

Preview Lab

Preview with #173B5D

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

Preview Lab → · Contrast checker → · Palette generator →