#173988#173988

#173988 is a dark, vivid blue. Relative luminance 0.049; OKLCH L 37.2% C 0.138 H 263.5°. Best body text is #FFFFFF at 10.62:1 contrast (WCAG AA passes).

Color values

HEX	#173988
RGB	rgb(23, 57, 136)
HSL	hsl(222, 71%, 31%)
HSV	hsv(222, 83%, 53%)
CMYK	cmyk(83.1%, 58.1%, 0%, 46.7%)
CIE-LAB	lab(26.41, 19.13, -47.53)
CIE-LCH	lch(26.41, 51.24, 291.92°)
OKLab	oklab(37.24% -0.0156 -0.1373)
OKLCH	oklch(37.24% 0.138 263.5)
XYZ	xyz(6.2588, 4.8852, 23.9009)
Luminance	0.0489 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173988 #886617

analogous

#177188 #173988 #2D1788

triadic

#173988 #881739 #398817

tetradic

#173988 #881771 #886617 #17882D

square

#173988 #881771 #886617 #17882D

split-complementary

#173988 #882D17 #718817

monochromatic

#050D1F #0E2354 #173988 #204FBC #3B6CDE

Accessibility & contrast

On white

10.62

#173988 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.98

#173988 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173988

10.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173988	#FFFFFF	#000000	##FFFFFF
##173988	1.00	10.62	1.98	10.62
#FFFFFF	10.62	1.00	21.00	1.00
#000000	1.98	21.00	1.00	21.00
##FFFFFF	10.62	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00448B

Deuteranopia (green-blind)

#003986

Tritanopia (blue-blind)

#004D5A

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #173988;
/* rgb */ color: rgb(23, 57, 136);
/* oklch */ color: oklch(37.2% 0.138 263.5);

Tailwind

colors: {
  custom: {
    50: '#696eab',
    500: '#173988',
    950: '#000000',
  },
}

SCSS

$custom: #173988;
$custom-light: #696eab;
$custom-dark: #000000;

JSON

{
  "hex": "#173988",
  "rgb": {
    "r": 23,
    "g": 57,
    "b": 136
  },
  "hsl": {
    "h": 221.947,
    "s": 71.069,
    "l": 31.176
  },
  "oklch": {
    "l": 0.37242,
    "c": 0.13816,
    "h": 263.5
  },
  "luminance": 0.04886
}

Semantic roles & 50–950 ramp

primary

#173988

secondary

#BC963F

accent

#B83AEE

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#070710

muted

#7A7A7F

Preview Lab

Preview with #173988

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

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