#173580#173580

#173580 is a dark, vivid blue. Relative luminance 0.043; OKLCH L 35.7% C 0.132 H 264.2°. Best body text is #FFFFFF at 11.31:1 contrast (WCAG AA passes).

Color values

HEX	#173580
RGB	rgb(23, 53, 128)
HSL	hsl(223, 70%, 30%)
HSV	hsv(223, 82%, 50%)
CMYK	cmyk(82%, 58.6%, 0%, 49.8%)
CIE-LAB	lab(24.60, 18.66, -45.48)
CIE-LCH	lch(24.60, 49.16, 292.31°)
OKLab	oklab(35.67% -0.0133 -0.1313)
OKLCH	oklch(35.67% 0.132 264.2)
XYZ	xyz(5.5213, 4.2862, 20.9542)
Luminance	0.0429 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173580 #806217

analogous

#176A80 #173580 #2E1780

triadic

#173580 #801735 #358017

tetradic

#173580 #80176A #806217 #17802E

square

#173580 #80176A #806217 #17802E

split-complementary

#173580 #802E17 #6A8017

monochromatic

#050B1A #0E204C #173580 #204AB4 #3665DB

Accessibility & contrast

On white

11.31

#173580 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.86

#173580 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173580

11.31:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173580	#FFFFFF	#000000	##FFFFFF
##173580	1.00	11.31	1.86	11.31
#FFFFFF	11.31	1.00	21.00	1.00
#000000	1.86	21.00	1.00	21.00
##FFFFFF	11.31	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003F83

Deuteranopia (green-blind)

#00367F

Tritanopia (blue-blind)

#004855

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #173580;
/* rgb */ color: rgb(23, 53, 128);
/* oklch */ color: oklch(35.7% 0.132 264.2);

Tailwind

colors: {
  custom: {
    50: '#676ba5',
    500: '#173580',
    950: '#000000',
  },
}

SCSS

$custom: #173580;
$custom-light: #676ba5;
$custom-dark: #000000;

JSON

{
  "hex": "#173580",
  "rgb": {
    "r": 23,
    "g": 53,
    "b": 128
  },
  "hsl": {
    "h": 222.857,
    "s": 69.536,
    "l": 29.608
  },
  "oklch": {
    "l": 0.35672,
    "c": 0.13198,
    "h": 264.2
  },
  "luminance": 0.04287
}

Semantic roles & 50–950 ramp

primary

#173580

secondary

#B4933E

accent

#BA3BEC

background

#F6F6FA

surface

#EBEBF4

border

#C6C6CE

text

#07060F

muted

#7A7A7F

Preview Lab

Preview with #173580

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

Preview Lab → · Contrast checker → · Palette generator →