#173D66#173D66

#173D66 is a dark, moderate cyan. Relative luminance 0.045; OKLCH L 35.5% C 0.083 H 252.7°. Best body text is #FFFFFF at 11.08:1 contrast (WCAG AA passes).

Color values

HEX	#173D66
RGB	rgb(23, 61, 102)
HSL	hsl(211, 63%, 25%)
HSV	hsv(211, 77%, 40%)
CMYK	cmyk(77.5%, 40.2%, 0%, 60%)
CIE-LAB	lab(25.19, 2.24, -27.96)
CIE-LCH	lch(25.19, 28.05, 274.57°)
OKLab	oklab(35.53% -0.0248 -0.0796)
OKLCH	oklch(35.53% 0.083 252.7)
XYZ	xyz(4.4195, 4.4785, 13.1993)
Luminance	0.0448 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173D66 #664017

analogous

#176566 #173D66 #181766

triadic

#173D66 #66173D #3D6617

tetradic

#173D66 #661765 #664017 #176618

square

#173D66 #661765 #664017 #176618

split-complementary

#173D66 #661817 #656617

monochromatic

#060F19 #0C1F34 #173D66 #225B98 #2E79CA

Accessibility & contrast

On white

11.08

#173D66 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.90

#173D66 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173D66

11.08:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173D66	#FFFFFF	#000000	##FFFFFF
##173D66	1.00	11.08	1.90	11.08
#FFFFFF	11.08	1.00	21.00	1.00
#000000	1.90	21.00	1.00	21.00
##FFFFFF	11.08	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2A4068

Deuteranopia (green-blind)

#1E3865

Tritanopia (blue-blind)

#00474C

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #173d66;
/* rgb */ color: rgb(23, 61, 102);
/* oklch */ color: oklch(35.5% 0.083 252.7);

Tailwind

colors: {
  custom: {
    50: '#607292',
    500: '#173d66',
    950: '#000000',
  },
}

SCSS

$custom: #173d66;
$custom-light: #607292;
$custom-dark: #000000;

JSON

{
  "hex": "#173d66",
  "rgb": {
    "r": 23,
    "g": 61,
    "b": 102
  },
  "hsl": {
    "h": 211.139,
    "s": 63.2,
    "l": 24.51
  },
  "oklch": {
    "l": 0.35534,
    "c": 0.08342,
    "h": 252.7
  },
  "luminance": 0.04479
}

Semantic roles & 50–950 ramp

primary

#173D66

secondary

#9C6E3C

accent

#9742E6

background

#F6F6F9

surface

#EBECF1

border

#C6C7CB

text

#05070D

muted

#7A7A7E

Preview Lab

Preview with #173D66

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

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