#173D64#173D64

#173D64 is a dark, moderate cyan. Relative luminance 0.044; OKLCH L 35.4% C 0.081 H 251.7°. Best body text is #FFFFFF at 11.12:1 contrast (WCAG AA passes).

Color values

HEX	#173D64
RGB	rgb(23, 61, 100)
HSL	hsl(210, 63%, 24%)
HSV	hsv(210, 77%, 39%)
CMYK	cmyk(77%, 39%, 0%, 60.8%)
CIE-LAB	lab(25.07, 1.42, -26.86)
CIE-LCH	lch(25.07, 26.90, 273.02°)
OKLab	oklab(35.4% -0.0253 -0.0764)
OKLCH	oklch(35.4% 0.081 251.7)
XYZ	xyz(4.3215, 4.4393, 12.6832)
Luminance	0.0444 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173D64 #643E17

analogous

#176464 #173D64 #181764

triadic

#173D64 #64173D #3D6417

tetradic

#173D64 #641764 #643E17 #176418

square

#173D64 #641764 #643E17 #176418

split-complementary

#173D64 #641817 #646417

monochromatic

#060F19 #0C1F32 #173D64 #225B96 #2E7AC8

Accessibility & contrast

On white

11.12

#173D64 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.89

#173D64 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173D64

11.12:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173D64	#FFFFFF	#000000	##FFFFFF
##173D64	1.00	11.12	1.89	11.12
#FFFFFF	11.12	1.00	21.00	1.00
#000000	1.89	21.00	1.00	21.00
##FFFFFF	11.12	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2B3F66

Deuteranopia (green-blind)

#203863

Tritanopia (blue-blind)

#00464B

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #173d64;
/* rgb */ color: rgb(23, 61, 100);
/* oklch */ color: oklch(35.4% 0.081 251.7);

Tailwind

colors: {
  custom: {
    50: '#5f7290',
    500: '#173d64',
    950: '#000000',
  },
}

SCSS

$custom: #173d64;
$custom-light: #5f7290;
$custom-dark: #000000;

JSON

{
  "hex": "#173d64",
  "rgb": {
    "r": 23,
    "g": 61,
    "b": 100
  },
  "hsl": {
    "h": 210.39,
    "s": 62.602,
    "l": 24.118
  },
  "oklch": {
    "l": 0.35401,
    "c": 0.08052,
    "h": 251.7
  },
  "luminance": 0.0444
}

Semantic roles & 50–950 ramp

primary

#173D64

secondary

#9A6C3C

accent

#9542E6

background

#F5F6F8

surface

#EAECF0

border

#C6C7CB

text

#05070C

muted

#797A7D

Preview Lab

Preview with #173D64

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

Preview Lab → · Contrast checker → · Palette generator →