#173C80#173C80

#173C80 is a dark, vivid blue. Relative luminance 0.050; OKLCH L 37.2% C 0.123 H 261.3°. Best body text is #FFFFFF at 10.53:1 contrast (WCAG AA passes).

Color values

HEX	#173C80
RGB	rgb(23, 60, 128)
HSL	hsl(219, 70%, 30%)
HSV	hsv(219, 82%, 50%)
CMYK	cmyk(82%, 53.1%, 0%, 49.8%)
CIE-LAB	lab(26.65, 13.72, -42.14)
CIE-LCH	lch(26.65, 44.31, 288.03°)
OKLab	oklab(37.23% -0.0186 -0.1213)
OKLCH	oklch(37.23% 0.123 261.3)
XYZ	xyz(5.8641, 4.9717, 21.0685)
Luminance	0.0497 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173C80 #805B17

analogous

#177180 #173C80 #271780

triadic

#173C80 #80173C #3C8017

tetradic

#173C80 #801771 #805B17 #178027

square

#173C80 #801771 #805B17 #178027

split-complementary

#173C80 #802717 #718017

monochromatic

#050C1A #0E244C #173C80 #2054B4 #3670DB

Accessibility & contrast

On white

10.53

#173C80 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.99

#173C80 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173C80

10.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173C80	#FFFFFF	#000000	##FFFFFF
##173C80	1.00	10.53	1.99	10.53
#FFFFFF	10.53	1.00	21.00	1.00
#000000	1.99	21.00	1.00	21.00
##FFFFFF	10.53	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0F4482

Deuteranopia (green-blind)

#003B7F

Tritanopia (blue-blind)

#004D58

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #173c80;
/* rgb */ color: rgb(23, 60, 128);
/* oklch */ color: oklch(37.2% 0.123 261.3);

Tailwind

colors: {
  custom: {
    50: '#6671a5',
    500: '#173c80',
    950: '#000000',
  },
}

SCSS

$custom: #173c80;
$custom-light: #6671a5;
$custom-dark: #000000;

JSON

{
  "hex": "#173c80",
  "rgb": {
    "r": 23,
    "g": 60,
    "b": 128
  },
  "hsl": {
    "h": 218.857,
    "s": 69.536,
    "l": 29.608
  },
  "oklch": {
    "l": 0.37232,
    "c": 0.12277,
    "h": 261.3
  },
  "luminance": 0.04972
}

Semantic roles & 50–950 ramp

primary

#173C80

secondary

#B48B3E

accent

#AE3BEC

background

#F6F6FA

surface

#EBECF4

border

#C6C7CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #173C80

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

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