#173383#173383

#173383 is a dark, vivid blue. Relative luminance 0.042; OKLCH L 35.5% C 0.139 H 265.1°. Best body text is #FFFFFF at 11.43:1 contrast (WCAG AA passes).

Color values

HEX	#173383
RGB	rgb(23, 51, 131)
HSL	hsl(224, 70%, 30%)
HSV	hsv(224, 82%, 51%)
CMYK	cmyk(82.4%, 61.1%, 0%, 48.6%)
CIE-LAB	lab(24.28, 21.30, -47.87)
CIE-LCH	lch(24.28, 52.40, 293.99°)
OKLab	oklab(35.52% -0.0118 -0.1384)
OKLCH	oklch(35.52% 0.139 265.1)
XYZ	xyz(5.6325, 4.1878, 21.9798)
Luminance	0.0419 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173383 #836717

analogous

#176983 #173383 #311783

triadic

#173383 #831733 #338317

tetradic

#173383 #831769 #836717 #178331

square

#173383 #831769 #836717 #178331

split-complementary

#173383 #833117 #698317

monochromatic

#050A1B #0E1F4F #173383 #2047B7 #3863DC

Accessibility & contrast

On white

11.43

#173383 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.84

#173383 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173383

11.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173383	#FFFFFF	#000000	##FFFFFF
##173383	1.00	11.43	1.84	11.43
#FFFFFF	11.43	1.00	21.00	1.00
#000000	1.84	21.00	1.00	21.00
##FFFFFF	11.43	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003F86

Deuteranopia (green-blind)

#003581

Tritanopia (blue-blind)

#004755

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #173383;
/* rgb */ color: rgb(23, 51, 131);
/* oklch */ color: oklch(35.5% 0.139 265.1);

Tailwind

colors: {
  custom: {
    50: '#686aa8',
    500: '#173383',
    950: '#000000',
  },
}

SCSS

$custom: #173383;
$custom-light: #686aa8;
$custom-dark: #000000;

JSON

{
  "hex": "#173383",
  "rgb": {
    "r": 23,
    "g": 51,
    "b": 131
  },
  "hsl": {
    "h": 224.444,
    "s": 70.13,
    "l": 30.196
  },
  "oklch": {
    "l": 0.35517,
    "c": 0.13887,
    "h": 265.1
  },
  "luminance": 0.04189
}

Semantic roles & 50–950 ramp

primary

#173383

secondary

#B7983F

accent

#BF3BED

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#070610

muted

#7A7A7F

Preview Lab

Preview with #173383

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

Preview Lab → · Contrast checker → · Palette generator →