#173B82#173B82

#173B82 is a dark, vivid blue. Relative luminance 0.049; OKLCH L 37.2% C 0.127 H 262.0°. Best body text is #FFFFFF at 10.58:1 contrast (WCAG AA passes).

Color values

HEX	#173B82
RGB	rgb(23, 59, 130)
HSL	hsl(220, 70%, 30%)
HSV	hsv(220, 82%, 51%)
CMYK	cmyk(82.3%, 54.6%, 0%, 49%)
CIE-LAB	lab(26.51, 15.25, -43.62)
CIE-LCH	lch(26.51, 46.21, 289.27°)
OKLab	oklab(37.17% -0.0176 -0.1257)
OKLCH	oklch(37.17% 0.127 262)
XYZ	xyz(5.9451, 4.9211, 21.7513)
Luminance	0.0492 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173B82 #825E17

analogous

#177182 #173B82 #281782

triadic

#173B82 #82173B #3B8217

tetradic

#173B82 #821771 #825E17 #178228

square

#173B82 #821771 #825E17 #178228

split-complementary

#173B82 #822817 #718217

monochromatic

#050C1A #0E234E #173B82 #2053B6 #386FDC

Accessibility & contrast

On white

10.58

#173B82 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.98

#173B82 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173B82

10.58:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173B82	#FFFFFF	#000000	##FFFFFF
##173B82	1.00	10.58	1.98	10.58
#FFFFFF	10.58	1.00	21.00	1.00
#000000	1.98	21.00	1.00	21.00
##FFFFFF	10.58	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#054485

Deuteranopia (green-blind)

#003A81

Tritanopia (blue-blind)

#004C58

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #173b82;
/* rgb */ color: rgb(23, 59, 130);
/* oklch */ color: oklch(37.2% 0.127 262.0);

Tailwind

colors: {
  custom: {
    50: '#6770a7',
    500: '#173b82',
    950: '#000000',
  },
}

SCSS

$custom: #173b82;
$custom-light: #6770a7;
$custom-dark: #000000;

JSON

{
  "hex": "#173b82",
  "rgb": {
    "r": 23,
    "g": 59,
    "b": 130
  },
  "hsl": {
    "h": 219.813,
    "s": 69.935,
    "l": 30
  },
  "oklch": {
    "l": 0.3717,
    "c": 0.12697,
    "h": 262
  },
  "luminance": 0.04922
}

Semantic roles & 50–950 ramp

primary

#173B82

secondary

#B68E3E

accent

#B13BED

background

#F6F6FA

surface

#EBECF4

border

#C6C7CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #173B82

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

Preview Lab → · Contrast checker → · Palette generator →