#173D84#173D84

#173D84 is a dark, vivid blue. Relative luminance 0.052; OKLCH L 37.8% C 0.127 H 261.5°. Best body text is #FFFFFF at 10.31:1 contrast (WCAG AA passes).

Color values

HEX	#173D84
RGB	rgb(23, 61, 132)
HSL	hsl(219, 70%, 30%)
HSV	hsv(219, 83%, 52%)
CMYK	cmyk(82.6%, 53.8%, 0%, 48.2%)
CIE-LAB	lab(27.26, 14.67, -43.66)
CIE-LCH	lch(27.26, 46.06, 288.57°)
OKLab	oklab(37.79% -0.0189 -0.1258)
OKLCH	oklch(37.79% 0.127 261.5)
XYZ	xyz(6.1854, 5.1849, 22.5001)
Luminance	0.0519 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173D84 #845E17

analogous

#177384 #173D84 #281784

triadic

#173D84 #84173D #3D8417

tetradic

#173D84 #841773 #845E17 #178428

square

#173D84 #841773 #845E17 #178428

split-complementary

#173D84 #842817 #738417

monochromatic

#050D1C #0E2550 #173D84 #2055B8 #3972DC

Accessibility & contrast

On white

10.31

#173D84 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.04

#173D84 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173D84

10.31:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173D84	#FFFFFF	#000000	##FFFFFF
##173D84	1.00	10.31	2.04	10.31
#FFFFFF	10.31	1.00	21.00	1.00
#000000	2.04	21.00	1.00	21.00
##FFFFFF	10.31	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0A4687

Deuteranopia (green-blind)

#003C83

Tritanopia (blue-blind)

#004E5A

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #173d84;
/* rgb */ color: rgb(23, 61, 132);
/* oklch */ color: oklch(37.8% 0.127 261.5);

Tailwind

colors: {
  custom: {
    50: '#6771a8',
    500: '#173d84',
    950: '#000000',
  },
}

SCSS

$custom: #173d84;
$custom-light: #6771a8;
$custom-dark: #000000;

JSON

{
  "hex": "#173d84",
  "rgb": {
    "r": 23,
    "g": 61,
    "b": 132
  },
  "hsl": {
    "h": 219.083,
    "s": 70.323,
    "l": 30.392
  },
  "oklch": {
    "l": 0.37786,
    "c": 0.12723,
    "h": 261.5
  },
  "luminance": 0.05186
}

Semantic roles & 50–950 ramp

primary

#173D84

secondary

#B88E3F

accent

#AF3BED

background

#F6F6FA

surface

#EBECF4

border

#C6C7CE

text

#070710

muted

#7A7A7F

Preview Lab

Preview with #173D84

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

Preview Lab → · Contrast checker → · Palette generator →