#173B73#173B73

#173B73 is a dark, moderate blue. Relative luminance 0.045; OKLCH L 36.0% C 0.105 H 259.1°. Best body text is #FFFFFF at 11.00:1 contrast (WCAG AA passes).

Color values

HEX	#173B73
RGB	rgb(23, 59, 115)
HSL	hsl(217, 67%, 27%)
HSV	hsv(217, 80%, 45%)
CMYK	cmyk(80%, 48.7%, 0%, 54.9%)
CIE-LAB	lab(25.40, 9.02, -35.95)
CIE-LCH	lch(25.40, 37.06, 284.08°)
OKLab	oklab(35.97% -0.0198 -0.1032)
OKLCH	oklch(35.97% 0.105 259.1)
XYZ	xyz(5.0107, 4.5473, 16.8300)
Luminance	0.0455 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173B73 #734F17

analogous

#176973 #173B73 #211773

triadic

#173B73 #73173B #3B7317

tetradic

#173B73 #731769 #734F17 #177321

square

#173B73 #731769 #734F17 #177321

split-complementary

#173B73 #732117 #697317

monochromatic

#050D1A #0D2140 #173B73 #2155A6 #2F70D5

Accessibility & contrast

On white

11.00

#173B73 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.91

#173B73 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173B73

11.00:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173B73	#FFFFFF	#000000	##FFFFFF
##173B73	1.00	11.00	1.91	11.00
#FFFFFF	11.00	1.00	21.00	1.00
#000000	1.91	21.00	1.00	21.00
##FFFFFF	11.00	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1D4175

Deuteranopia (green-blind)

#063872

Tritanopia (blue-blind)

#004851

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #173b73;
/* rgb */ color: rgb(23, 59, 115);
/* oklch */ color: oklch(36.0% 0.105 259.1);

Tailwind

colors: {
  custom: {
    50: '#63709c',
    500: '#173b73',
    950: '#000000',
  },
}

SCSS

$custom: #173b73;
$custom-light: #63709c;
$custom-dark: #000000;

JSON

{
  "hex": "#173b73",
  "rgb": {
    "r": 23,
    "g": 59,
    "b": 115
  },
  "hsl": {
    "h": 216.522,
    "s": 66.667,
    "l": 27.059
  },
  "oklch": {
    "l": 0.35972,
    "c": 0.10504,
    "h": 259.1
  },
  "luminance": 0.04548
}

Semantic roles & 50–950 ramp

primary

#173B73

secondary

#A97F3D

accent

#A73EEA

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06070E

muted

#7A7A7E

Preview Lab

Preview with #173B73

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

Preview Lab → · Contrast checker → · Palette generator →