#173A5F#173A5F

#173A5F is a dark, moderate cyan. Relative luminance 0.040; OKLCH L 34.3% C 0.077 H 252.1°. Best body text is #FFFFFF at 11.62:1 contrast (WCAG AA passes).

Color values

HEX	#173A5F
RGB	rgb(23, 58, 95)
HSL	hsl(211, 61%, 23%)
HSV	hsv(211, 76%, 37%)
CMYK	cmyk(75.8%, 38.9%, 0%, 62.7%)
CIE-LAB	lab(23.78, 1.43, -25.66)
CIE-LCH	lch(23.78, 25.70, 273.20°)
OKLab	oklab(34.29% -0.0236 -0.073)
OKLCH	oklch(34.29% 0.077 252.1)
XYZ	xyz(3.9312, 4.0341, 11.3957)
Luminance	0.0403 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173A5F #5F3C17

analogous

#175E5F #173A5F #18175F

triadic

#173A5F #5F173A #3A5F17

tetradic

#173A5F #5F175E #5F3C17 #175F18

square

#173A5F #5F175E #5F3C17 #175F18

split-complementary

#173A5F #5F1817 #5E5F17

monochromatic

#060F19 #0B1C2E #173A5F #235890 #2F76C2

Accessibility & contrast

On white

11.62

#173A5F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.81

#173A5F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173A5F

11.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173A5F	#FFFFFF	#000000	##FFFFFF
##173A5F	1.00	11.62	1.81	11.62
#FFFFFF	11.62	1.00	21.00	1.00
#000000	1.81	21.00	1.00	21.00
##FFFFFF	11.62	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#293C61

Deuteranopia (green-blind)

#1F365E

Tritanopia (blue-blind)

#004348

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #173a5f;
/* rgb */ color: rgb(23, 58, 95);
/* oklch */ color: oklch(34.3% 0.077 252.1);

Tailwind

colors: {
  custom: {
    50: '#5e6f8c',
    500: '#173a5f',
    950: '#000000',
  },
}

SCSS

$custom: #173a5f;
$custom-light: #5e6f8c;
$custom-dark: #000000;

JSON

{
  "hex": "#173a5f",
  "rgb": {
    "r": 23,
    "g": 58,
    "b": 95
  },
  "hsl": {
    "h": 210.833,
    "s": 61.017,
    "l": 23.137
  },
  "oklch": {
    "l": 0.34294,
    "c": 0.07668,
    "h": 252.1
  },
  "luminance": 0.04034
}

Semantic roles & 50–950 ramp

primary

#173A5F

secondary

#966A3C

accent

#9644E4

background

#F5F6F8

surface

#EAECF0

border

#C6C7CB

text

#05070C

muted

#797A7D

Preview Lab

Preview with #173A5F

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

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