#173F5E#173F5E

#173F5E is a dark, moderate cyan. Relative luminance 0.045; OKLCH L 35.5% C 0.070 H 245.1°. Best body text is #FFFFFF at 11.00:1 contrast (WCAG AA passes).

Color values

HEX	#173F5E
RGB	rgb(23, 63, 94)
HSL	hsl(206, 61%, 23%)
HSV	hsv(206, 76%, 37%)
CMYK	cmyk(75.5%, 33%, 0%, 63.1%)
CIE-LAB	lab(25.40, -2.36, -22.46)
CIE-LCH	lch(25.40, 22.59, 264.00°)
OKLab	oklab(35.54% -0.0294 -0.0636)
OKLCH	oklch(35.54% 0.07 245.1)
XYZ	xyz(4.1505, 4.5449, 11.2460)
Luminance	0.0454 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173F5E #5E3617

analogous

#175E59 #173F5E #171B5E

triadic

#173F5E #5E173F #3F5E17

tetradic

#173F5E #59175E #5E3617 #1B5E17

square

#173F5E #59175E #5E3617 #1B5E17

split-complementary

#173F5E #5E171B #5E5917

monochromatic

#061019 #0B1E2D #173F5E #23608F #2F81C0

Accessibility & contrast

On white

11.00

#173F5E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.91

#173F5E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173F5E

11.00:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173F5E	#FFFFFF	#000000	##FFFFFF
##173F5E	1.00	11.00	1.91	11.00
#FFFFFF	11.00	1.00	21.00	1.00
#000000	1.91	21.00	1.00	21.00
##FFFFFF	11.00	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#31405F

Deuteranopia (green-blind)

#27395D

Tritanopia (blue-blind)

#00464A

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #173f5e;
/* rgb */ color: rgb(23, 63, 94);
/* oklch */ color: oklch(35.5% 0.070 245.1);

Tailwind

colors: {
  custom: {
    50: '#5e738c',
    500: '#173f5e',
    950: '#000000',
  },
}

SCSS

$custom: #173f5e;
$custom-light: #5e738c;
$custom-dark: #000000;

JSON

{
  "hex": "#173f5e",
  "rgb": {
    "r": 23,
    "g": 63,
    "b": 94
  },
  "hsl": {
    "h": 206.197,
    "s": 60.684,
    "l": 22.941
  },
  "oklch": {
    "l": 0.35543,
    "c": 0.07006,
    "h": 245.1
  },
  "luminance": 0.04545
}

Semantic roles & 50–950 ramp

primary

#173F5E

secondary

#95633C

accent

#8A44E4

background

#F5F7F8

surface

#EAEDF0

border

#C6C8CB

text

#05080C

muted

#797B7D

Preview Lab

Preview with #173F5E

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

Preview Lab → · Contrast checker → · Palette generator →