#173E83#173E83

#173E83 is a dark, vivid blue. Relative luminance 0.053; OKLCH L 37.9% C 0.124 H 260.8°. Best body text is #FFFFFF at 10.23:1 contrast (WCAG AA passes).

Color values

HEX	#173E83
RGB	rgb(23, 62, 131)
HSL	hsl(218, 70%, 30%)
HSV	hsv(218, 82%, 51%)
CMYK	cmyk(82.4%, 52.7%, 0%, 48.6%)
CIE-LAB	lab(27.48, 13.56, -42.68)
CIE-LCH	lch(27.48, 44.78, 287.62°)
OKLab	oklab(37.93% -0.0198 -0.1229)
OKLCH	oklch(37.93% 0.125 260.8)
XYZ	xyz(6.1712, 5.2654, 22.1594)
Luminance	0.0527 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173E83 #835C17

analogous

#177483 #173E83 #261783

triadic

#173E83 #83173E #3E8317

tetradic

#173E83 #831774 #835C17 #178326

square

#173E83 #831774 #835C17 #178326

split-complementary

#173E83 #832617 #748317

monochromatic

#050D1B #0E254F #173E83 #2057B7 #3873DC

Accessibility & contrast

On white

10.23

#173E83 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.05

#173E83 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173E83

10.23:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173E83	#FFFFFF	#000000	##FFFFFF
##173E83	1.00	10.23	2.05	10.23
#FFFFFF	10.23	1.00	21.00	1.00
#000000	2.05	21.00	1.00	21.00
##FFFFFF	10.23	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#114685

Deuteranopia (green-blind)

#003C82

Tritanopia (blue-blind)

#004F5A

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #173e83;
/* rgb */ color: rgb(23, 62, 131);
/* oklch */ color: oklch(37.9% 0.124 260.8);

Tailwind

colors: {
  custom: {
    50: '#6772a8',
    500: '#173e83',
    950: '#000000',
  },
}

SCSS

$custom: #173e83;
$custom-light: #6772a8;
$custom-dark: #000000;

JSON

{
  "hex": "#173e83",
  "rgb": {
    "r": 23,
    "g": 62,
    "b": 131
  },
  "hsl": {
    "h": 218.333,
    "s": 70.13,
    "l": 30.196
  },
  "oklch": {
    "l": 0.37932,
    "c": 0.1245,
    "h": 260.8
  },
  "luminance": 0.05266
}

Semantic roles & 50–950 ramp

primary

#173E83

secondary

#B78C3F

accent

#AD3BED

background

#F6F6FA

surface

#EBECF4

border

#C6C7CE

text

#07080F

muted

#7A7B7F

Preview Lab

Preview with #173E83

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

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