#173C5E#173C5E

#173C5E is a dark, moderate cyan. Relative luminance 0.042; OKLCH L 34.8% C 0.073 H 249.1°. Best body text is #FFFFFF at 11.39:1 contrast (WCAG AA passes).

Color values

HEX	#173C5E
RGB	rgb(23, 60, 94)
HSL	hsl(209, 61%, 23%)
HSV	hsv(209, 76%, 37%)
CMYK	cmyk(75.5%, 36.2%, 0%, 63.1%)
CIE-LAB	lab(24.39, -0.34, -24.05)
CIE-LCH	lch(24.39, 24.05, 269.18°)
OKLab	oklab(34.75% -0.0261 -0.0682)
OKLCH	oklch(34.75% 0.073 249.1)
XYZ	xyz(3.9888, 4.2216, 11.1921)
Luminance	0.0422 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173C5E #5E3917

analogous

#175E5C #173C5E #17195E

triadic

#173C5E #5E173C #3C5E17

tetradic

#173C5E #5C175E #5E3917 #195E17

square

#173C5E #5C175E #5E3917 #195E17

split-complementary

#173C5E #5E1719 #5E5C17

monochromatic

#061019 #0B1D2D #173C5E #235B8F #2F7BC0

Accessibility & contrast

On white

11.39

#173C5E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.84

#173C5E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173C5E

11.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173C5E	#FFFFFF	#000000	##FFFFFF
##173C5E	1.00	11.39	1.84	11.39
#FFFFFF	11.39	1.00	21.00	1.00
#000000	1.84	21.00	1.00	21.00
##FFFFFF	11.39	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2D3E5F

Deuteranopia (green-blind)

#23375D

Tritanopia (blue-blind)

#004448

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #173c5e;
/* rgb */ color: rgb(23, 60, 94);
/* oklch */ color: oklch(34.8% 0.073 249.1);

Tailwind

colors: {
  custom: {
    50: '#5e718c',
    500: '#173c5e',
    950: '#000000',
  },
}

SCSS

$custom: #173c5e;
$custom-light: #5e718c;
$custom-dark: #000000;

JSON

{
  "hex": "#173c5e",
  "rgb": {
    "r": 23,
    "g": 60,
    "b": 94
  },
  "hsl": {
    "h": 208.732,
    "s": 60.684,
    "l": 22.941
  },
  "oklch": {
    "l": 0.34751,
    "c": 0.07304,
    "h": 249.1
  },
  "luminance": 0.04222
}

Semantic roles & 50–950 ramp

primary

#173C5E

secondary

#95673C

accent

#9144E4

background

#F5F6F8

surface

#EAECF0

border

#C6C7CB

text

#05070C

muted

#797A7D

Preview Lab

Preview with #173C5E

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

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