#173E5D#173E5D

#173E5D is a dark, moderate cyan. Relative luminance 0.044; OKLCH L 35.2% C 0.070 H 245.7°. Best body text is #FFFFFF at 11.15:1 contrast (WCAG AA passes).

Color values

HEX	#173E5D
RGB	rgb(23, 62, 93)
HSL	hsl(207, 60%, 23%)
HSV	hsv(207, 75%, 36%)
CMYK	cmyk(75.3%, 33.3%, 0%, 63.5%)
CIE-LAB	lab(25.01, -2.09, -22.43)
CIE-LCH	lch(25.01, 22.53, 264.66°)
OKLab	oklab(35.22% -0.0287 -0.0635)
OKLCH	oklch(35.22% 0.07 245.7)
XYZ	xyz(4.0510, 4.4173, 10.9929)
Luminance	0.0442 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173E5D #5D3617

analogous

#175D59 #173E5D #171B5D

triadic

#173E5D #5D173E #3E5D17

tetradic

#173E5D #59175D #5D3617 #1B5D17

square

#173E5D #59175D #5D3617 #1B5D17

split-complementary

#173E5D #5D171B #5D5917

monochromatic

#061019 #0B1D2C #173E5D #235F8E #2F7FBF

Accessibility & contrast

On white

11.15

#173E5D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.88

#173E5D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173E5D

11.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173E5D	#FFFFFF	#000000	##FFFFFF
##173E5D	1.00	11.15	1.88	11.15
#FFFFFF	11.15	1.00	21.00	1.00
#000000	1.88	21.00	1.00	21.00
##FFFFFF	11.15	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#303F5E

Deuteranopia (green-blind)

#26385C

Tritanopia (blue-blind)

#004549

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #173e5d;
/* rgb */ color: rgb(23, 62, 93);
/* oklch */ color: oklch(35.2% 0.070 245.7);

Tailwind

colors: {
  custom: {
    50: '#5e738b',
    500: '#173e5d',
    950: '#000000',
  },
}

SCSS

$custom: #173e5d;
$custom-light: #5e738b;
$custom-dark: #000000;

JSON

{
  "hex": "#173e5d",
  "rgb": {
    "r": 23,
    "g": 62,
    "b": 93
  },
  "hsl": {
    "h": 206.571,
    "s": 60.345,
    "l": 22.745
  },
  "oklch": {
    "l": 0.35216,
    "c": 0.06965,
    "h": 245.7
  },
  "luminance": 0.04418
}

Semantic roles & 50–950 ramp

primary

#173E5D

secondary

#94633C

accent

#8B44E3

background

#F5F6F8

surface

#EAECF0

border

#C6C7CB

text

#05080C

muted

#797B7D

Preview Lab

Preview with #173E5D

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

Preview Lab → · Contrast checker → · Palette generator →