#173B63#173B63

#173B63 is a dark, moderate cyan. Relative luminance 0.042; OKLCH L 34.8% C 0.081 H 253.2°. Best body text is #FFFFFF at 11.40:1 contrast (WCAG AA passes).

Color values

HEX	#173B63
RGB	rgb(23, 59, 99)
HSL	hsl(212, 62%, 24%)
HSV	hsv(212, 77%, 39%)
CMYK	cmyk(76.8%, 40.4%, 0%, 61.2%)
CIE-LAB	lab(24.36, 2.38, -27.35)
CIE-LCH	lch(24.36, 27.46, 274.98°)
OKLab	oklab(34.82% -0.0235 -0.0779)
OKLCH	oklch(34.82% 0.081 253.2)
XYZ	xyz(4.1686, 4.2105, 12.3950)
Luminance	0.0421 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173B63 #633F17

analogous

#176163 #173B63 #191763

triadic

#173B63 #63173B #3B6317

tetradic

#173B63 #631761 #633F17 #176319

square

#173B63 #631761 #633F17 #176319

split-complementary

#173B63 #631917 #616317

monochromatic

#060F19 #0B1D31 #173B63 #235995 #2E76C6

Accessibility & contrast

On white

11.40

#173B63 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.84

#173B63 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173B63

11.40:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173B63	#FFFFFF	#000000	##FFFFFF
##173B63	1.00	11.40	1.84	11.40
#FFFFFF	11.40	1.00	21.00	1.00
#000000	1.84	21.00	1.00	21.00
##FFFFFF	11.40	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#293E65

Deuteranopia (green-blind)

#1D3762

Tritanopia (blue-blind)

#00444A

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #173b63;
/* rgb */ color: rgb(23, 59, 99);
/* oklch */ color: oklch(34.8% 0.081 253.2);

Tailwind

colors: {
  custom: {
    50: '#5f708f',
    500: '#173b63',
    950: '#000000',
  },
}

SCSS

$custom: #173b63;
$custom-light: #5f708f;
$custom-dark: #000000;

JSON

{
  "hex": "#173b63",
  "rgb": {
    "r": 23,
    "g": 59,
    "b": 99
  },
  "hsl": {
    "h": 211.579,
    "s": 62.295,
    "l": 23.922
  },
  "oklch": {
    "l": 0.3482,
    "c": 0.08138,
    "h": 253.2
  },
  "luminance": 0.04211
}

Semantic roles & 50–950 ramp

primary

#173B63

secondary

#9A6D3C

accent

#9842E5

background

#F5F6F8

surface

#EAECF0

border

#C6C7CB

text

#05070C

muted

#797A7D

Preview Lab

Preview with #173B63

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

Preview Lab → · Contrast checker → · Palette generator →