#173D75#173D75

#173D75 is a dark, moderate blue. Relative luminance 0.048; OKLCH L 36.6% C 0.105 H 258.4°. Best body text is #FFFFFF at 10.71:1 contrast (WCAG AA passes).

Color values

HEX	#173D75
RGB	rgb(23, 61, 117)
HSL	hsl(216, 67%, 27%)
HSV	hsv(216, 80%, 46%)
CMYK	cmyk(80.3%, 47.9%, 0%, 54.1%)
CIE-LAB	lab(26.17, 8.44, -35.99)
CIE-LCH	lch(26.17, 36.97, 283.20°)
OKLab	oklab(36.6% -0.0213 -0.1032)
OKLCH	oklch(36.6% 0.105 258.4)
XYZ	xyz(5.2318, 4.8034, 17.4776)
Luminance	0.0480 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173D75 #754F17

analogous

#176C75 #173D75 #201775

triadic

#173D75 #75173D #3D7517

tetradic

#173D75 #75176C #754F17 #177520

square

#173D75 #75176C #754F17 #177520

split-complementary

#173D75 #752017 #6C7517

monochromatic

#050D1A #0D2242 #173D75 #2158A8 #3073D6

Accessibility & contrast

On white

10.71

#173D75 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.96

#173D75 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173D75

10.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173D75	#FFFFFF	#000000	##FFFFFF
##173D75	1.00	10.71	1.96	10.71
#FFFFFF	10.71	1.00	21.00	1.00
#000000	1.96	21.00	1.00	21.00
##FFFFFF	10.71	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1F4377

Deuteranopia (green-blind)

#093A74

Tritanopia (blue-blind)

#004A53

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #173d75;
/* rgb */ color: rgb(23, 61, 117);
/* oklch */ color: oklch(36.6% 0.105 258.4);

Tailwind

colors: {
  custom: {
    50: '#64729d',
    500: '#173d75',
    950: '#000000',
  },
}

SCSS

$custom: #173d75;
$custom-light: #64729d;
$custom-dark: #000000;

JSON

{
  "hex": "#173d75",
  "rgb": {
    "r": 23,
    "g": 61,
    "b": 117
  },
  "hsl": {
    "h": 215.745,
    "s": 67.143,
    "l": 27.451
  },
  "oklch": {
    "l": 0.36605,
    "c": 0.10541,
    "h": 258.4
  },
  "luminance": 0.04804
}

Semantic roles & 50–950 ramp

primary

#173D75

secondary

#AA7E3D

accent

#A43EEA

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06070E

muted

#7A7A7E

Preview Lab

Preview with #173D75

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

Preview Lab → · Contrast checker → · Palette generator →