#173783#173783

#173783 is a dark, vivid blue. Relative luminance 0.046; OKLCH L 36.4% C 0.134 H 263.8°. Best body text is #FFFFFF at 10.99:1 contrast (WCAG AA passes).

Color values

HEX	#173783
RGB	rgb(23, 55, 131)
HSL	hsl(222, 70%, 30%)
HSV	hsv(222, 82%, 51%)
CMYK	cmyk(82.4%, 58%, 0%, 48.6%)
CIE-LAB	lab(25.42, 18.48, -46.02)
CIE-LCH	lch(25.42, 49.59, 291.88°)
OKLab	oklab(36.37% -0.0145 -0.1329)
OKLCH	oklch(36.37% 0.134 263.8)
XYZ	xyz(5.8148, 4.5525, 22.0406)
Luminance	0.0455 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173783 #836317

analogous

#176D83 #173783 #2D1783

triadic

#173783 #831737 #378317

tetradic

#173783 #83176D #836317 #17832D

square

#173783 #83176D #836317 #17832D

split-complementary

#173783 #832D17 #6D8317

monochromatic

#050B1B #0E214F #173783 #204DB7 #3869DC

Accessibility & contrast

On white

10.99

#173783 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.91

#173783 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173783

10.99:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173783	#FFFFFF	#000000	##FFFFFF
##173783	1.00	10.99	1.91	10.99
#FFFFFF	10.99	1.00	21.00	1.00
#000000	1.91	21.00	1.00	21.00
##FFFFFF	10.99	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004186

Deuteranopia (green-blind)

#003782

Tritanopia (blue-blind)

#004A57

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #173783;
/* rgb */ color: rgb(23, 55, 131);
/* oklch */ color: oklch(36.4% 0.134 263.8);

Tailwind

colors: {
  custom: {
    50: '#686da8',
    500: '#173783',
    950: '#000000',
  },
}

SCSS

$custom: #173783;
$custom-light: #686da8;
$custom-dark: #000000;

JSON

{
  "hex": "#173783",
  "rgb": {
    "r": 23,
    "g": 55,
    "b": 131
  },
  "hsl": {
    "h": 222.222,
    "s": 70.13,
    "l": 30.196
  },
  "oklch": {
    "l": 0.3637,
    "c": 0.13365,
    "h": 263.8
  },
  "luminance": 0.04553
}

Semantic roles & 50–950 ramp

primary

#173783

secondary

#B7933F

accent

#B83BED

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#070710

muted

#7A7A7F

Preview Lab

Preview with #173783

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

Preview Lab → · Contrast checker → · Palette generator →