#173984#173984

#173984 is a dark, vivid blue. Relative luminance 0.048; OKLCH L 36.9% C 0.132 H 263.1°. Best body text is #FFFFFF at 10.74:1 contrast (WCAG AA passes).

Color values

HEX	#173984
RGB	rgb(23, 57, 132)
HSL	hsl(221, 70%, 30%)
HSV	hsv(221, 83%, 52%)
CMYK	cmyk(82.6%, 56.8%, 0%, 48.2%)
CIE-LAB	lab(26.08, 17.48, -45.57)
CIE-LCH	lch(26.08, 48.81, 290.99°)
OKLab	oklab(36.89% -0.0159 -0.1315)
OKLCH	oklch(36.89% 0.132 263.1)
XYZ	xyz(5.9798, 4.7736, 22.4316)
Luminance	0.0477 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173984 #846217

analogous

#177084 #173984 #2B1784

triadic

#173984 #841739 #398417

tetradic

#173984 #841770 #846217 #17842B

square

#173984 #841770 #846217 #17842B

split-complementary

#173984 #842B17 #708417

monochromatic

#050C1C #0E2250 #173984 #2050B8 #396CDC

Accessibility & contrast

On white

10.74

#173984 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.95

#173984 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173984

10.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173984	#FFFFFF	#000000	##FFFFFF
##173984	1.00	10.74	1.95	10.74
#FFFFFF	10.74	1.00	21.00	1.00
#000000	1.95	21.00	1.00	21.00
##FFFFFF	10.74	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004387

Deuteranopia (green-blind)

#003983

Tritanopia (blue-blind)

#004C58

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #173984;
/* rgb */ color: rgb(23, 57, 132);
/* oklch */ color: oklch(36.9% 0.132 263.1);

Tailwind

colors: {
  custom: {
    50: '#686ea8',
    500: '#173984',
    950: '#000000',
  },
}

SCSS

$custom: #173984;
$custom-light: #686ea8;
$custom-dark: #000000;

JSON

{
  "hex": "#173984",
  "rgb": {
    "r": 23,
    "g": 57,
    "b": 132
  },
  "hsl": {
    "h": 221.284,
    "s": 70.323,
    "l": 30.392
  },
  "oklch": {
    "l": 0.36894,
    "c": 0.13247,
    "h": 263.1
  },
  "luminance": 0.04774
}

Semantic roles & 50–950 ramp

primary

#173984

secondary

#B8923F

accent

#B53BED

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#070710

muted

#7A7A7F

Preview Lab

Preview with #173984

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

Preview Lab → · Contrast checker → · Palette generator →