#173D73#173D73

#173D73 is a dark, moderate blue. Relative luminance 0.048; OKLCH L 36.5% C 0.102 H 257.8°. Best body text is #FFFFFF at 10.76:1 contrast (WCAG AA passes).

Color values

HEX	#173D73
RGB	rgb(23, 61, 115)
HSL	hsl(215, 67%, 27%)
HSV	hsv(215, 80%, 45%)
CMYK	cmyk(80%, 47%, 0%, 54.9%)
CIE-LAB	lab(26.03, 7.61, -34.94)
CIE-LCH	lch(26.03, 35.76, 282.29°)
OKLab	oklab(36.46% -0.0216 -0.1002)
OKLCH	oklch(36.46% 0.102 257.8)
XYZ	xyz(5.1155, 4.7569, 16.8649)
Luminance	0.0476 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173D73 #734D17

analogous

#176B73 #173D73 #1F1773

triadic

#173D73 #73173D #3D7317

tetradic

#173D73 #73176B #734D17 #17731F

square

#173D73 #73176B #734D17 #17731F

split-complementary

#173D73 #731F17 #6B7317

monochromatic

#050E1A #0D2240 #173D73 #2158A6 #2F74D5

Accessibility & contrast

On white

10.76

#173D73 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.95

#173D73 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173D73

10.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173D73	#FFFFFF	#000000	##FFFFFF
##173D73	1.00	10.76	1.95	10.76
#FFFFFF	10.76	1.00	21.00	1.00
#000000	1.95	21.00	1.00	21.00
##FFFFFF	10.76	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#214275

Deuteranopia (green-blind)

#0E3A72

Tritanopia (blue-blind)

#004A52

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #173d73;
/* rgb */ color: rgb(23, 61, 115);
/* oklch */ color: oklch(36.5% 0.102 257.8);

Tailwind

colors: {
  custom: {
    50: '#63729c',
    500: '#173d73',
    950: '#000000',
  },
}

SCSS

$custom: #173d73;
$custom-light: #63729c;
$custom-dark: #000000;

JSON

{
  "hex": "#173d73",
  "rgb": {
    "r": 23,
    "g": 61,
    "b": 115
  },
  "hsl": {
    "h": 215.217,
    "s": 66.667,
    "l": 27.059
  },
  "oklch": {
    "l": 0.36455,
    "c": 0.10247,
    "h": 257.8
  },
  "luminance": 0.04757
}

Semantic roles & 50–950 ramp

primary

#173D73

secondary

#A97C3D

accent

#A33EEA

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06070E

muted

#7A7A7E

Preview Lab

Preview with #173D73

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

Preview Lab → · Contrast checker → · Palette generator →