#173F6A#173F6A

#173F6A is a dark, moderate cyan. Relative luminance 0.048; OKLCH L 36.3% C 0.087 H 252.8°. Best body text is #FFFFFF at 10.74:1 contrast (WCAG AA passes).

Color values

HEX	#173F6A
RGB	rgb(23, 63, 106)
HSL	hsl(211, 64%, 25%)
HSV	hsv(211, 78%, 42%)
CMYK	cmyk(78.3%, 40.6%, 0%, 58.4%)
CIE-LAB	lab(26.09, 2.51, -29.10)
CIE-LCH	lch(26.09, 29.21, 274.92°)
OKLab	oklab(36.31% -0.0257 -0.083)
OKLCH	oklch(36.31% 0.087 252.8)
XYZ	xyz(4.7314, 4.7772, 14.3056)
Luminance	0.0478 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173F6A #6A4217

analogous

#17686A #173F6A #18176A

triadic

#173F6A #6A173F #3F6A17

tetradic

#173F6A #6A1768 #6A4217 #176A18

square

#173F6A #6A1768 #6A4217 #176A18

split-complementary

#173F6A #6A1817 #686A17

monochromatic

#050F19 #0C2138 #173F6A #225D9C #2D7BCF

Accessibility & contrast

On white

10.74

#173F6A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.96

#173F6A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173F6A

10.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173F6A	#FFFFFF	#000000	##FFFFFF
##173F6A	1.00	10.74	1.96	10.74
#FFFFFF	10.74	1.00	21.00	1.00
#000000	1.96	21.00	1.00	21.00
##FFFFFF	10.74	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2B426C

Deuteranopia (green-blind)

#1E3A69

Tritanopia (blue-blind)

#00494F

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #173f6a;
/* rgb */ color: rgb(23, 63, 106);
/* oklch */ color: oklch(36.3% 0.087 252.8);

Tailwind

colors: {
  custom: {
    50: '#617395',
    500: '#173f6a',
    950: '#000000',
  },
}

SCSS

$custom: #173f6a;
$custom-light: #617395;
$custom-dark: #000000;

JSON

{
  "hex": "#173f6a",
  "rgb": {
    "r": 23,
    "g": 63,
    "b": 106
  },
  "hsl": {
    "h": 211.084,
    "s": 64.341,
    "l": 25.294
  },
  "oklch": {
    "l": 0.36314,
    "c": 0.08687,
    "h": 252.8
  },
  "luminance": 0.04778
}

Semantic roles & 50–950 ramp

primary

#173F6A

secondary

#A0703D

accent

#9740E7

background

#F6F6F9

surface

#EBECF1

border

#C6C7CB

text

#05080D

muted

#7A7B7E

Preview Lab

Preview with #173F6A

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

Preview Lab → · Contrast checker → · Palette generator →