#173D82#173D82

#173D82 is a dark, vivid blue. Relative luminance 0.051; OKLCH L 37.6% C 0.124 H 261.1°. Best body text is #FFFFFF at 10.36:1 contrast (WCAG AA passes).

Color values

HEX	#173D82
RGB	rgb(23, 61, 130)
HSL	hsl(219, 70%, 30%)
HSV	hsv(219, 82%, 51%)
CMYK	cmyk(82.3%, 53.1%, 0%, 49%)
CIE-LAB	lab(27.10, 13.84, -42.66)
CIE-LCH	lch(27.10, 44.85, 287.98°)
OKLab	oklab(37.62% -0.0191 -0.1229)
OKLCH	oklch(37.62% 0.124 261.1)
XYZ	xyz(6.0499, 5.1306, 21.7862)
Luminance	0.0513 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173D82 #825C17

analogous

#177282 #173D82 #271782

triadic

#173D82 #82173D #3D8217

tetradic

#173D82 #821772 #825C17 #178227

square

#173D82 #821772 #825C17 #178227

split-complementary

#173D82 #822717 #728217

monochromatic

#050C1A #0E254E #173D82 #2055B6 #3872DC

Accessibility & contrast

On white

10.36

#173D82 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.03

#173D82 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173D82

10.36:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173D82	#FFFFFF	#000000	##FFFFFF
##173D82	1.00	10.36	2.03	10.36
#FFFFFF	10.36	1.00	21.00	1.00
#000000	2.03	21.00	1.00	21.00
##FFFFFF	10.36	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0F4584

Deuteranopia (green-blind)

#003B81

Tritanopia (blue-blind)

#004E59

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #173d82;
/* rgb */ color: rgb(23, 61, 130);
/* oklch */ color: oklch(37.6% 0.124 261.1);

Tailwind

colors: {
  custom: {
    50: '#6771a7',
    500: '#173d82',
    950: '#000000',
  },
}

SCSS

$custom: #173d82;
$custom-light: #6771a7;
$custom-dark: #000000;

JSON

{
  "hex": "#173d82",
  "rgb": {
    "r": 23,
    "g": 61,
    "b": 130
  },
  "hsl": {
    "h": 218.692,
    "s": 69.935,
    "l": 30
  },
  "oklch": {
    "l": 0.37623,
    "c": 0.12435,
    "h": 261.1
  },
  "luminance": 0.05131
}

Semantic roles & 50–950 ramp

primary

#173D82

secondary

#B68C3E

accent

#AE3BED

background

#F6F6FA

surface

#EBECF4

border

#C6C7CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #173D82

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

Preview Lab → · Contrast checker → · Palette generator →