#173F64#173F64

#173F64 is a dark, moderate cyan. Relative luminance 0.047; OKLCH L 35.9% C 0.078 H 249.5°. Best body text is #FFFFFF at 10.87:1 contrast (WCAG AA passes).

Color values

HEX	#173F64
RGB	rgb(23, 63, 100)
HSL	hsl(209, 63%, 24%)
HSV	hsv(209, 77%, 39%)
CMYK	cmyk(77%, 37%, 0%, 60.8%)
CIE-LAB	lab(25.73, 0.05, -25.81)
CIE-LCH	lch(25.73, 25.81, 270.12°)
OKLab	oklab(35.92% -0.0275 -0.0733)
OKLCH	oklch(35.92% 0.078 249.5)
XYZ	xyz(4.4302, 4.6568, 12.7195)
Luminance	0.0466 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173F64 #643C17

analogous

#176463 #173F64 #171964

triadic

#173F64 #64173F #3F6417

tetradic

#173F64 #631764 #643C17 #196417

square

#173F64 #631764 #643C17 #196417

split-complementary

#173F64 #641719 #646317

monochromatic

#061019 #0C2032 #173F64 #225E96 #2E7EC8

Accessibility & contrast

On white

10.87

#173F64 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.93

#173F64 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173F64

10.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173F64	#FFFFFF	#000000	##FFFFFF
##173F64	1.00	10.87	1.93	10.87
#FFFFFF	10.87	1.00	21.00	1.00
#000000	1.93	21.00	1.00	21.00
##FFFFFF	10.87	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2E4166

Deuteranopia (green-blind)

#233A63

Tritanopia (blue-blind)

#00484C

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #173f64;
/* rgb */ color: rgb(23, 63, 100);
/* oklch */ color: oklch(35.9% 0.078 249.5);

Tailwind

colors: {
  custom: {
    50: '#607390',
    500: '#173f64',
    950: '#000000',
  },
}

SCSS

$custom: #173f64;
$custom-light: #607390;
$custom-dark: #000000;

JSON

{
  "hex": "#173f64",
  "rgb": {
    "r": 23,
    "g": 63,
    "b": 100
  },
  "hsl": {
    "h": 208.831,
    "s": 62.602,
    "l": 24.118
  },
  "oklch": {
    "l": 0.35918,
    "c": 0.07832,
    "h": 249.5
  },
  "luminance": 0.04657
}

Semantic roles & 50–950 ramp

primary

#173F64

secondary

#9A6A3C

accent

#9142E6

background

#F5F6F8

surface

#EAECF0

border

#C6C7CB

text

#05080C

muted

#797B7D

Preview Lab

Preview with #173F64

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

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