#173C77#173C77

#173C77 is a dark, moderate blue. Relative luminance 0.047; OKLCH L 36.5% C 0.110 H 259.5°. Best body text is #FFFFFF at 10.77:1 contrast (WCAG AA passes).

Color values

HEX	#173C77
RGB	rgb(23, 60, 119)
HSL	hsl(217, 68%, 28%)
HSV	hsv(217, 81%, 47%)
CMYK	cmyk(80.7%, 49.6%, 0%, 53.3%)
CIE-LAB	lab(26.00, 9.98, -37.53)
CIE-LCH	lch(26.00, 38.84, 284.89°)
OKLab	oklab(36.52% -0.02 -0.1078)
OKLCH	oklch(36.52% 0.11 259.5)
XYZ	xyz(5.2978, 4.7452, 18.0859)
Luminance	0.0475 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173C77 #775217

analogous

#176C77 #173C77 #221777

triadic

#173C77 #77173C #3C7717

tetradic

#173C77 #77176C #775217 #177722

square

#173C77 #77176C #775217 #177722

split-complementary

#173C77 #772217 #6C7717

monochromatic

#050D1A #0D2244 #173C77 #2156AA #3171D7

Accessibility & contrast

On white

10.77

#173C77 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.95

#173C77 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173C77

10.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173C77	#FFFFFF	#000000	##FFFFFF
##173C77	1.00	10.77	1.95	10.77
#FFFFFF	10.77	1.00	21.00	1.00
#000000	1.95	21.00	1.00	21.00
##FFFFFF	10.77	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1B4279

Deuteranopia (green-blind)

#003976

Tritanopia (blue-blind)

#004A53

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #173c77;
/* rgb */ color: rgb(23, 60, 119);
/* oklch */ color: oklch(36.5% 0.110 259.5);

Tailwind

colors: {
  custom: {
    50: '#64719f',
    500: '#173c77',
    950: '#000000',
  },
}

SCSS

$custom: #173c77;
$custom-light: #64719f;
$custom-dark: #000000;

JSON

{
  "hex": "#173c77",
  "rgb": {
    "r": 23,
    "g": 60,
    "b": 119
  },
  "hsl": {
    "h": 216.875,
    "s": 67.606,
    "l": 27.843
  },
  "oklch": {
    "l": 0.36518,
    "c": 0.10964,
    "h": 259.5
  },
  "luminance": 0.04746
}

Semantic roles & 50–950 ramp

primary

#173C77

secondary

#AC823E

accent

#A83DEA

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06070E

muted

#7A7A7E

Preview Lab

Preview with #173C77

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

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