#172B77#172B77

#172B77 is a dark, vivid blue. Relative luminance 0.032; OKLCH L 32.7% C 0.132 H 267.1°. Best body text is #FFFFFF at 12.74:1 contrast (WCAG AA passes).

Color values

HEX	#172B77
RGB	rgb(23, 43, 119)
HSL	hsl(228, 68%, 28%)
HSV	hsv(228, 81%, 47%)
CMYK	cmyk(80.7%, 63.9%, 0%, 53.3%)
CIE-LAB	lab(20.99, 22.07, -45.66)
CIE-LCH	lch(20.99, 50.72, 295.80°)
OKLab	oklab(32.73% -0.0066 -0.132)
OKLCH	oklch(32.73% 0.132 267.1)
XYZ	xyz(4.5458, 3.2413, 17.8352)
Luminance	0.0324 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172B77 #776317

analogous

#175B77 #172B77 #331777

triadic

#172B77 #77172B #2B7717

tetradic

#172B77 #77175B #776317 #177733

square

#172B77 #77175B #776317 #177733

split-complementary

#172B77 #773317 #5B7717

monochromatic

#05091A #0D1844 #172B77 #213EAA #3154D7

Accessibility & contrast

On white

12.74

#172B77 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.65

#172B77 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172B77

12.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172B77	#FFFFFF	#000000	##FFFFFF
##172B77	1.00	12.74	1.65	12.74
#FFFFFF	12.74	1.00	21.00	1.00
#000000	1.65	21.00	1.00	21.00
##FFFFFF	12.74	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003779

Deuteranopia (green-blind)

#002E76

Tritanopia (blue-blind)

#003F4C

Achromatopsia (no color)

#323232

Design tokens & code

CSS

--color: #172b77;
/* rgb */ color: rgb(23, 43, 119);
/* oklch */ color: oklch(32.7% 0.132 267.1);

Tailwind

colors: {
  custom: {
    50: '#65649f',
    500: '#172b77',
    950: '#000000',
  },
}

SCSS

$custom: #172b77;
$custom-light: #65649f;
$custom-dark: #000000;

JSON

{
  "hex": "#172b77",
  "rgb": {
    "r": 23,
    "g": 43,
    "b": 119
  },
  "hsl": {
    "h": 227.5,
    "s": 67.606,
    "l": 27.843
  },
  "oklch": {
    "l": 0.32728,
    "c": 0.13218,
    "h": 267.1
  },
  "luminance": 0.03242
}

Semantic roles & 50–950 ramp

primary

#172B77

secondary

#AC953E

accent

#C63DEA

background

#F6F5F9

surface

#EBEAF2

border

#C6C6CC

text

#07050F

muted

#7A797E

Preview Lab

Preview with #172B77

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

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