#173B66#173B66

#173B66 is a dark, moderate cyan. Relative luminance 0.043; OKLCH L 35.0% C 0.086 H 254.7°. Best body text is #FFFFFF at 11.33:1 contrast (WCAG AA passes).

Color values

HEX	#173B66
RGB	rgb(23, 59, 102)
HSL	hsl(213, 63%, 25%)
HSV	hsv(213, 77%, 40%)
CMYK	cmyk(77.5%, 42.2%, 0%, 60%)
CIE-LAB	lab(24.54, 3.62, -29.00)
CIE-LCH	lch(24.54, 29.22, 277.11°)
OKLab	oklab(35.03% -0.0227 -0.0827)
OKLCH	oklch(35.03% 0.086 254.7)
XYZ	xyz(4.3147, 4.2689, 13.1644)
Luminance	0.0427 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173B66 #664217

analogous

#176366 #173B66 #1A1766

triadic

#173B66 #66173B #3B6617

tetradic

#173B66 #661763 #664217 #17661A

square

#173B66 #661763 #664217 #17661A

split-complementary

#173B66 #661A17 #636617

monochromatic

#060E19 #0C1E34 #173B66 #225898 #2E75CA

Accessibility & contrast

On white

11.33

#173B66 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.85

#173B66 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173B66

11.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173B66	#FFFFFF	#000000	##FFFFFF
##173B66	1.00	11.33	1.85	11.33
#FFFFFF	11.33	1.00	21.00	1.00
#000000	1.85	21.00	1.00	21.00
##FFFFFF	11.33	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#273E68

Deuteranopia (green-blind)

#1A3765

Tritanopia (blue-blind)

#00454B

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #173b66;
/* rgb */ color: rgb(23, 59, 102);
/* oklch */ color: oklch(35.0% 0.086 254.7);

Tailwind

colors: {
  custom: {
    50: '#607092',
    500: '#173b66',
    950: '#000000',
  },
}

SCSS

$custom: #173b66;
$custom-light: #607092;
$custom-dark: #000000;

JSON

{
  "hex": "#173b66",
  "rgb": {
    "r": 23,
    "g": 59,
    "b": 102
  },
  "hsl": {
    "h": 212.658,
    "s": 63.2,
    "l": 24.51
  },
  "oklch": {
    "l": 0.35025,
    "c": 0.08579,
    "h": 254.7
  },
  "luminance": 0.04269
}

Semantic roles & 50–950 ramp

primary

#173B66

secondary

#9C713C

accent

#9B42E6

background

#F6F6F9

surface

#EBECF1

border

#C6C7CB

text

#05070D

muted

#7A7A7E

Preview Lab

Preview with #173B66

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

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