#173B84#173B84

#173B84 is a dark, vivid blue. Relative luminance 0.050; OKLCH L 37.3% C 0.130 H 262.3°. Best body text is #FFFFFF at 10.53:1 contrast (WCAG AA passes).

Color values

HEX	#173B84
RGB	rgb(23, 59, 132)
HSL	hsl(220, 70%, 30%)
HSV	hsv(220, 83%, 52%)
CMYK	cmyk(82.6%, 55.3%, 0%, 48.2%)
CIE-LAB	lab(26.66, 16.08, -44.62)
CIE-LCH	lch(26.66, 47.43, 289.81°)
OKLab	oklab(37.34% -0.0174 -0.1287)
OKLCH	oklch(37.34% 0.13 262.3)
XYZ	xyz(6.0807, 4.9753, 22.4652)
Luminance	0.0498 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173B84 #846017

analogous

#177284 #173B84 #291784

triadic

#173B84 #84173B #3B8417

tetradic

#173B84 #841772 #846017 #178429

square

#173B84 #841772 #846017 #178429

split-complementary

#173B84 #842917 #728417

monochromatic

#050C1C #0E2450 #173B84 #2052B8 #396FDC

Accessibility & contrast

On white

10.53

#173B84 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.00

#173B84 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173B84

10.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173B84	#FFFFFF	#000000	##FFFFFF
##173B84	1.00	10.53	2.00	10.53
#FFFFFF	10.53	1.00	21.00	1.00
#000000	2.00	21.00	1.00	21.00
##FFFFFF	10.53	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004487

Deuteranopia (green-blind)

#003A83

Tritanopia (blue-blind)

#004D59

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #173b84;
/* rgb */ color: rgb(23, 59, 132);
/* oklch */ color: oklch(37.3% 0.130 262.3);

Tailwind

colors: {
  custom: {
    50: '#6870a8',
    500: '#173b84',
    950: '#000000',
  },
}

SCSS

$custom: #173b84;
$custom-light: #6870a8;
$custom-dark: #000000;

JSON

{
  "hex": "#173b84",
  "rgb": {
    "r": 23,
    "g": 59,
    "b": 132
  },
  "hsl": {
    "h": 220.183,
    "s": 70.323,
    "l": 30.392
  },
  "oklch": {
    "l": 0.37337,
    "c": 0.12985,
    "h": 262.3
  },
  "luminance": 0.04976
}

Semantic roles & 50–950 ramp

primary

#173B84

secondary

#B8903F

accent

#B23BED

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#070710

muted

#7A7A7F

Preview Lab

Preview with #173B84

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

Preview Lab → · Contrast checker → · Palette generator →