#173D80#173D80

#173D80 is a dark, vivid blue. Relative luminance 0.051; OKLCH L 37.5% C 0.121 H 260.8°. Best body text is #FFFFFF at 10.42:1 contrast (WCAG AA passes).

Color values

HEX	#173D80
RGB	rgb(23, 61, 128)
HSL	hsl(218, 70%, 30%)
HSV	hsv(218, 82%, 50%)
CMYK	cmyk(82%, 52.3%, 0%, 49.8%)
CIE-LAB	lab(26.95, 13.02, -41.65)
CIE-LCH	lch(26.95, 43.64, 287.35°)
OKLab	oklab(37.46% -0.0194 -0.1199)
OKLCH	oklch(37.46% 0.121 260.8)
XYZ	xyz(5.9170, 5.0775, 21.0861)
Luminance	0.0508 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173D80 #805A17

analogous

#177180 #173D80 #261780

triadic

#173D80 #80173D #3D8017

tetradic

#173D80 #801771 #805A17 #178026

square

#173D80 #801771 #805A17 #178026

split-complementary

#173D80 #802617 #718017

monochromatic

#050C1A #0E244C #173D80 #2056B4 #3672DB

Accessibility & contrast

On white

10.42

#173D80 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.02

#173D80 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173D80

10.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173D80	#FFFFFF	#000000	##FFFFFF
##173D80	1.00	10.42	2.02	10.42
#FFFFFF	10.42	1.00	21.00	1.00
#000000	2.02	21.00	1.00	21.00
##FFFFFF	10.42	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#124582

Deuteranopia (green-blind)

#003B7F

Tritanopia (blue-blind)

#004D58

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #173d80;
/* rgb */ color: rgb(23, 61, 128);
/* oklch */ color: oklch(37.5% 0.121 260.8);

Tailwind

colors: {
  custom: {
    50: '#6671a5',
    500: '#173d80',
    950: '#000000',
  },
}

SCSS

$custom: #173d80;
$custom-light: #6671a5;
$custom-dark: #000000;

JSON

{
  "hex": "#173d80",
  "rgb": {
    "r": 23,
    "g": 61,
    "b": 128
  },
  "hsl": {
    "h": 218.286,
    "s": 69.536,
    "l": 29.608
  },
  "oklch": {
    "l": 0.37461,
    "c": 0.12146,
    "h": 260.8
  },
  "luminance": 0.05078
}

Semantic roles & 50–950 ramp

primary

#173D80

secondary

#B48A3E

accent

#AC3BEC

background

#F6F6FA

surface

#EBECF4

border

#C6C7CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #173D80

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

Preview Lab → · Contrast checker → · Palette generator →