#173E75#173E75

#173E75 is a dark, moderate blue. Relative luminance 0.049; OKLCH L 36.8% C 0.104 H 257.7°. Best body text is #FFFFFF at 10.59:1 contrast (WCAG AA passes).

Color values

HEX	#173E75
RGB	rgb(23, 62, 117)
HSL	hsl(215, 67%, 27%)
HSV	hsv(215, 80%, 46%)
CMYK	cmyk(80.3%, 47%, 0%, 54.1%)
CIE-LAB	lab(26.48, 7.75, -35.49)
CIE-LCH	lch(26.48, 36.32, 282.31°)
OKLab	oklab(36.85% -0.0222 -0.1017)
OKLCH	oklch(36.85% 0.104 257.7)
XYZ	xyz(5.2857, 4.9111, 17.4955)
Luminance	0.0491 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173E75 #754E17

analogous

#176D75 #173E75 #1F1775

triadic

#173E75 #75173E #3E7517

tetradic

#173E75 #75176D #754E17 #17751F

square

#173E75 #75176D #754E17 #17751F

split-complementary

#173E75 #751F17 #6D7517

monochromatic

#050E1A #0D2342 #173E75 #2159A8 #3075D6

Accessibility & contrast

On white

10.59

#173E75 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.98

#173E75 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173E75

10.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173E75	#FFFFFF	#000000	##FFFFFF
##173E75	1.00	10.59	1.98	10.59
#FFFFFF	10.59	1.00	21.00	1.00
#000000	1.98	21.00	1.00	21.00
##FFFFFF	10.59	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#214377

Deuteranopia (green-blind)

#0D3B74

Tritanopia (blue-blind)

#004B53

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #173e75;
/* rgb */ color: rgb(23, 62, 117);
/* oklch */ color: oklch(36.8% 0.104 257.7);

Tailwind

colors: {
  custom: {
    50: '#64729d',
    500: '#173e75',
    950: '#000000',
  },
}

SCSS

$custom: #173e75;
$custom-light: #64729d;
$custom-dark: #000000;

JSON

{
  "hex": "#173e75",
  "rgb": {
    "r": 23,
    "g": 62,
    "b": 117
  },
  "hsl": {
    "h": 215.106,
    "s": 67.143,
    "l": 27.451
  },
  "oklch": {
    "l": 0.36846,
    "c": 0.10414,
    "h": 257.7
  },
  "luminance": 0.04912
}

Semantic roles & 50–950 ramp

primary

#173E75

secondary

#AA7D3D

accent

#A33EEA

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06080E

muted

#7A7B7E

Preview Lab

Preview with #173E75

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

Preview Lab → · Contrast checker → · Palette generator →