#173F77#173F77

#173F77 is a dark, moderate blue. Relative luminance 0.051; OKLCH L 37.2% C 0.106 H 257.6°. Best body text is #FFFFFF at 10.43:1 contrast (WCAG AA passes).

Color values

HEX	#173F77
RGB	rgb(23, 63, 119)
HSL	hsl(215, 68%, 28%)
HSV	hsv(215, 81%, 47%)
CMYK	cmyk(80.7%, 47.1%, 0%, 53.3%)
CIE-LAB	lab(26.93, 7.88, -36.03)
CIE-LCH	lch(26.93, 36.89, 282.34°)
OKLab	oklab(37.24% -0.0227 -0.1033)
OKLCH	oklch(37.24% 0.106 257.6)
XYZ	xyz(5.4594, 5.0684, 18.1398)
Luminance	0.0507 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173F77 #774F17

analogous

#176F77 #173F77 #1F1777

triadic

#173F77 #77173F #3F7717

tetradic

#173F77 #77176F #774F17 #17771F

square

#173F77 #77176F #774F17 #17771F

split-complementary

#173F77 #771F17 #6F7717

monochromatic

#050E1A #0D2444 #173F77 #215AAA #3176D7

Accessibility & contrast

On white

10.43

#173F77 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.01

#173F77 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173F77

10.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173F77	#FFFFFF	#000000	##FFFFFF
##173F77	1.00	10.43	2.01	10.43
#FFFFFF	10.43	1.00	21.00	1.00
#000000	2.01	21.00	1.00	21.00
##FFFFFF	10.43	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#224479

Deuteranopia (green-blind)

#0D3C76

Tritanopia (blue-blind)

#004C55

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #173f77;
/* rgb */ color: rgb(23, 63, 119);
/* oklch */ color: oklch(37.2% 0.106 257.6);

Tailwind

colors: {
  custom: {
    50: '#64739f',
    500: '#173f77',
    950: '#000000',
  },
}

SCSS

$custom: #173f77;
$custom-light: #64739f;
$custom-dark: #000000;

JSON

{
  "hex": "#173f77",
  "rgb": {
    "r": 23,
    "g": 63,
    "b": 119
  },
  "hsl": {
    "h": 215,
    "s": 67.606,
    "l": 27.843
  },
  "oklch": {
    "l": 0.37237,
    "c": 0.10579,
    "h": 257.6
  },
  "luminance": 0.05069
}

Semantic roles & 50–950 ramp

primary

#173F77

secondary

#AC7E3E

accent

#A23DEA

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06080E

muted

#7A7B7E

Preview Lab

Preview with #173F77

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

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