#173F69#173F69

#173F69 is a dark, moderate cyan. Relative luminance 0.048; OKLCH L 36.2% C 0.085 H 252.3°. Best body text is #FFFFFF at 10.76:1 contrast (WCAG AA passes).

Color values

HEX	#173F69
RGB	rgb(23, 63, 105)
HSL	hsl(211, 64%, 25%)
HSV	hsv(211, 78%, 41%)
CMYK	cmyk(78.1%, 40%, 0%, 58.8%)
CIE-LAB	lab(26.03, 2.10, -28.56)
CIE-LCH	lch(26.03, 28.64, 274.20°)
OKLab	oklab(36.25% -0.026 -0.0814)
OKLCH	oklch(36.25% 0.085 252.3)
XYZ	xyz(4.6797, 4.7566, 14.0333)
Luminance	0.0476 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173F69 #694117

analogous

#176869 #173F69 #181769

triadic

#173F69 #69173F #3F6917

tetradic

#173F69 #691768 #694117 #176918

square

#173F69 #691768 #694117 #176918

split-complementary

#173F69 #691817 #686917

monochromatic

#050F19 #0C2137 #173F69 #225D9B #2D7BCD

Accessibility & contrast

On white

10.76

#173F69 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.95

#173F69 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173F69

10.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173F69	#FFFFFF	#000000	##FFFFFF
##173F69	1.00	10.76	1.95	10.76
#FFFFFF	10.76	1.00	21.00	1.00
#000000	1.95	21.00	1.00	21.00
##FFFFFF	10.76	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2C426B

Deuteranopia (green-blind)

#1F3A68

Tritanopia (blue-blind)

#00494F

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #173f69;
/* rgb */ color: rgb(23, 63, 105);
/* oklch */ color: oklch(36.2% 0.085 252.3);

Tailwind

colors: {
  custom: {
    50: '#617394',
    500: '#173f69',
    950: '#000000',
  },
}

SCSS

$custom: #173f69;
$custom-light: #617394;
$custom-dark: #000000;

JSON

{
  "hex": "#173f69",
  "rgb": {
    "r": 23,
    "g": 63,
    "b": 105
  },
  "hsl": {
    "h": 210.732,
    "s": 64.063,
    "l": 25.098
  },
  "oklch": {
    "l": 0.36247,
    "c": 0.08544,
    "h": 252.3
  },
  "luminance": 0.04757
}

Semantic roles & 50–950 ramp

primary

#173F69

secondary

#9F6F3D

accent

#9641E7

background

#F6F6F9

surface

#EBECF1

border

#C6C7CB

text

#05080D

muted

#7A7B7E

Preview Lab

Preview with #173F69

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

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