#173F66#173F66

#173F66 is a dark, moderate cyan. Relative luminance 0.047; OKLCH L 36.0% C 0.081 H 250.7°. Best body text is #FFFFFF at 10.83:1 contrast (WCAG AA passes).

Color values

HEX	#173F66
RGB	rgb(23, 63, 102)
HSL	hsl(210, 63%, 25%)
HSV	hsv(210, 77%, 40%)
CMYK	cmyk(77.5%, 38.2%, 0%, 60%)
CIE-LAB	lab(25.85, 0.87, -26.92)
CIE-LCH	lch(25.85, 26.93, 271.85°)
OKLab	oklab(36.05% -0.0269 -0.0766)
OKLCH	oklch(36.05% 0.081 250.7)
XYZ	xyz(4.5282, 4.6960, 13.2356)
Luminance	0.0470 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173F66 #663E17

analogous

#176666 #173F66 #171866

triadic

#173F66 #66173F #3F6617

tetradic

#173F66 #661766 #663E17 #186617

square

#173F66 #661766 #663E17 #186617

split-complementary

#173F66 #661718 #666617

monochromatic

#060F19 #0C2034 #173F66 #225E98 #2E7DCA

Accessibility & contrast

On white

10.83

#173F66 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.94

#173F66 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173F66

10.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173F66	#FFFFFF	#000000	##FFFFFF
##173F66	1.00	10.83	1.94	10.83
#FFFFFF	10.83	1.00	21.00	1.00
#000000	1.94	21.00	1.00	21.00
##FFFFFF	10.83	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2D4168

Deuteranopia (green-blind)

#223A65

Tritanopia (blue-blind)

#00484D

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #173f66;
/* rgb */ color: rgb(23, 63, 102);
/* oklch */ color: oklch(36.0% 0.081 250.7);

Tailwind

colors: {
  custom: {
    50: '#607392',
    500: '#173f66',
    950: '#000000',
  },
}

SCSS

$custom: #173f66;
$custom-light: #607392;
$custom-dark: #000000;

JSON

{
  "hex": "#173f66",
  "rgb": {
    "r": 23,
    "g": 63,
    "b": 102
  },
  "hsl": {
    "h": 209.62,
    "s": 63.2,
    "l": 24.51
  },
  "oklch": {
    "l": 0.36048,
    "c": 0.08115,
    "h": 250.7
  },
  "luminance": 0.04696
}

Semantic roles & 50–950 ramp

primary

#173F66

secondary

#9C6C3C

accent

#9342E6

background

#F6F6F9

surface

#EBECF1

border

#C6C7CB

text

#05080D

muted

#7A7B7E

Preview Lab

Preview with #173F66

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

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