#173A5C#173A5C

#173A5C is a dark, moderate cyan. Relative luminance 0.040; OKLCH L 34.1% C 0.072 H 250.2°. Best body text is #FFFFFF at 11.69:1 contrast (WCAG AA passes).

Color values

HEX	#173A5C
RGB	rgb(23, 58, 92)
HSL	hsl(210, 60%, 23%)
HSV	hsv(210, 75%, 36%)
CMYK	cmyk(75%, 37%, 0%, 63.9%)
CIE-LAB	lab(23.61, 0.21, -23.98)
CIE-LCH	lch(23.61, 23.98, 270.50°)
OKLab	oklab(34.1% -0.0245 -0.0681)
OKLCH	oklch(34.1% 0.072 250.2)
XYZ	xyz(3.7975, 3.9806, 10.6913)
Luminance	0.0398 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173A5C #5C3917

analogous

#175C5B #173A5C #17185C

triadic

#173A5C #5C173A #3A5C17

tetradic

#173A5C #5B175C #5C3917 #185C17

square

#173A5C #5B175C #5C3917 #185C17

split-complementary

#173A5C #5C1718 #5C5B17

monochromatic

#060F18 #0B1B2B #173A5C #23598D #2F78BE

Accessibility & contrast

On white

11.69

#173A5C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.80

#173A5C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173A5C

11.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173A5C	#FFFFFF	#000000	##FFFFFF
##173A5C	1.00	11.69	1.80	11.69
#FFFFFF	11.69	1.00	21.00	1.00
#000000	1.80	21.00	1.00	21.00
##FFFFFF	11.69	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2B3C5D

Deuteranopia (green-blind)

#21355B

Tritanopia (blue-blind)

#004246

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #173a5c;
/* rgb */ color: rgb(23, 58, 92);
/* oklch */ color: oklch(34.1% 0.072 250.2);

Tailwind

colors: {
  custom: {
    50: '#5e6f8a',
    500: '#173a5c',
    950: '#000000',
  },
}

SCSS

$custom: #173a5c;
$custom-light: #5e6f8a;
$custom-dark: #000000;

JSON

{
  "hex": "#173a5c",
  "rgb": {
    "r": 23,
    "g": 58,
    "b": 92
  },
  "hsl": {
    "h": 209.565,
    "s": 60,
    "l": 22.549
  },
  "oklch": {
    "l": 0.34098,
    "c": 0.07233,
    "h": 250.2
  },
  "luminance": 0.03981
}

Semantic roles & 50–950 ramp

primary

#173A5C

secondary

#93673C

accent

#9345E3

background

#F5F6F8

surface

#E9ECF0

border

#C5C7CB

text

#05070B

muted

#797A7C

Preview Lab

Preview with #173A5C

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

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