#173C75#173C75

#173C75 is a dark, moderate blue. Relative luminance 0.047; OKLCH L 36.4% C 0.107 H 259.0°. Best body text is #FFFFFF at 10.83:1 contrast (WCAG AA passes).

Color values

HEX	#173C75
RGB	rgb(23, 60, 117)
HSL	hsl(216, 67%, 27%)
HSV	hsv(216, 80%, 46%)
CMYK	cmyk(80.3%, 48.7%, 0%, 54.1%)
CIE-LAB	lab(25.86, 9.14, -36.49)
CIE-LCH	lch(25.86, 37.62, 284.07°)
OKLab	oklab(36.36% -0.0203 -0.1047)
OKLCH	oklch(36.36% 0.107 259)
XYZ	xyz(5.1789, 4.6976, 17.4600)
Luminance	0.0470 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173C75 #755017

analogous

#176B75 #173C75 #211775

triadic

#173C75 #75173C #3C7517

tetradic

#173C75 #75176B #755017 #177521

square

#173C75 #75176B #755017 #177521

split-complementary

#173C75 #752117 #6B7517

monochromatic

#050D1A #0D2242 #173C75 #2156A8 #3072D6

Accessibility & contrast

On white

10.83

#173C75 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.94

#173C75 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173C75

10.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173C75	#FFFFFF	#000000	##FFFFFF
##173C75	1.00	10.83	1.94	10.83
#FFFFFF	10.83	1.00	21.00	1.00
#000000	1.94	21.00	1.00	21.00
##FFFFFF	10.83	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1D4277

Deuteranopia (green-blind)

#053974

Tritanopia (blue-blind)

#004A52

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #173c75;
/* rgb */ color: rgb(23, 60, 117);
/* oklch */ color: oklch(36.4% 0.107 259.0);

Tailwind

colors: {
  custom: {
    50: '#64719d',
    500: '#173c75',
    950: '#000000',
  },
}

SCSS

$custom: #173c75;
$custom-light: #64719d;
$custom-dark: #000000;

JSON

{
  "hex": "#173c75",
  "rgb": {
    "r": 23,
    "g": 60,
    "b": 117
  },
  "hsl": {
    "h": 216.383,
    "s": 67.143,
    "l": 27.451
  },
  "oklch": {
    "l": 0.36364,
    "c": 0.1067,
    "h": 259
  },
  "luminance": 0.04698
}

Semantic roles & 50–950 ramp

primary

#173C75

secondary

#AA7F3D

accent

#A63EEA

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06070E

muted

#7A7A7E

Preview Lab

Preview with #173C75

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

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