#173B4F#173B4F

#173B4F is a dark, muted cyan. Relative luminance 0.039; OKLCH L 33.6% C 0.054 H 235.9°. Best body text is #FFFFFF at 11.83:1 contrast (WCAG AA passes).

Color values

HEX	#173B4F
RGB	rgb(23, 59, 79)
HSL	hsl(201, 55%, 20%)
HSV	hsv(201, 71%, 31%)
CMYK	cmyk(70.9%, 25.3%, 0%, 69%)
CIE-LAB	lab(23.25, -5.61, -15.98)
CIE-LCH	lch(23.25, 16.94, 250.66°)
OKLab	oklab(33.59% -0.0303 -0.0448)
OKLCH	oklch(33.59% 0.054 235.9)
XYZ	xyz(3.3281, 3.8743, 7.9680)
Luminance	0.0387 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173B4F #4F2B17

analogous

#174F47 #173B4F #171F4F

triadic

#173B4F #4F173B #3B4F17

tetradic

#173B4F #47174F #4F2B17 #1F4F17

square

#173B4F #47174F #4F2B17 #1F4F17

split-complementary

#173B4F #4F171F #4F4717

monochromatic

#071218 #091820 #173B4F #255E7E #3382AE

Accessibility & contrast

On white

11.83

#173B4F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.78

#173B4F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173B4F

11.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173B4F	#FFFFFF	#000000	##FFFFFF
##173B4F	1.00	11.83	1.78	11.83
#FFFFFF	11.83	1.00	21.00	1.00
#000000	1.78	21.00	1.00	21.00
##FFFFFF	11.83	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#323B50

Deuteranopia (green-blind)

#2A354F

Tritanopia (blue-blind)

#004042

Achromatopsia (no color)

#373737

Design tokens & code

CSS

--color: #173b4f;
/* rgb */ color: rgb(23, 59, 79);
/* oklch */ color: oklch(33.6% 0.054 235.9);

Tailwind

colors: {
  custom: {
    50: '#5b7080',
    500: '#173b4f',
    950: '#000000',
  },
}

SCSS

$custom: #173b4f;
$custom-light: #5b7080;
$custom-dark: #000000;

JSON

{
  "hex": "#173b4f",
  "rgb": {
    "r": 23,
    "g": 59,
    "b": 79
  },
  "hsl": {
    "h": 201.429,
    "s": 54.902,
    "l": 20
  },
  "oklch": {
    "l": 0.33588,
    "c": 0.05414,
    "h": 235.9
  },
  "luminance": 0.03875
}

Semantic roles & 50–950 ramp

primary

#173B4F

secondary

#86563C

accent

#7F4ADE

background

#F5F6F7

surface

#E9ECEE

border

#C5C7C9

text

#04070A

muted

#797A7C

Preview Lab

Preview with #173B4F

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

Preview Lab → · Contrast checker → · Palette generator →