#172F85#172F85

#172F85 is a dark, vivid blue. Relative luminance 0.039; OKLCH L 34.9% C 0.147 H 266.4°. Best body text is #FFFFFF at 11.79:1 contrast (WCAG AA passes).

Color values

HEX	#172F85
RGB	rgb(23, 47, 133)
HSL	hsl(227, 71%, 31%)
HSV	hsv(227, 83%, 52%)
CMYK	cmyk(82.7%, 64.7%, 0%, 47.8%)
CIE-LAB	lab(23.36, 24.91, -50.62)
CIE-LCH	lch(23.36, 56.42, 296.20°)
OKLab	oklab(34.89% -0.0092 -0.1465)
OKLCH	oklch(34.89% 0.147 266.4)
XYZ	xyz(5.6020, 3.9080, 22.6448)
Luminance	0.0391 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172F85 #856D17

analogous

#176685 #172F85 #361785

triadic

#172F85 #85172F #2F8517

tetradic

#172F85 #851766 #856D17 #178536

square

#172F85 #851766 #856D17 #178536

split-complementary

#172F85 #853617 #668517

monochromatic

#050A1D #0E1D51 #172F85 #2041B9 #3A5DDD

Accessibility & contrast

On white

11.79

#172F85 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.78

#172F85 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172F85

11.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172F85	#FFFFFF	#000000	##FFFFFF
##172F85	1.00	11.79	1.78	11.79
#FFFFFF	11.79	1.00	21.00	1.00
#000000	1.78	21.00	1.00	21.00
##FFFFFF	11.79	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003D88

Deuteranopia (green-blind)

#003383

Tritanopia (blue-blind)

#004655

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #172f85;
/* rgb */ color: rgb(23, 47, 133);
/* oklch */ color: oklch(34.9% 0.147 266.4);

Tailwind

colors: {
  custom: {
    50: '#6967a9',
    500: '#172f85',
    950: '#000000',
  },
}

SCSS

$custom: #172f85;
$custom-light: #6967a9;
$custom-dark: #000000;

JSON

{
  "hex": "#172f85",
  "rgb": {
    "r": 23,
    "g": 47,
    "b": 133
  },
  "hsl": {
    "h": 226.909,
    "s": 70.513,
    "l": 30.588
  },
  "oklch": {
    "l": 0.34889,
    "c": 0.14679,
    "h": 266.4
  },
  "luminance": 0.03909
}

Semantic roles & 50–950 ramp

primary

#172F85

secondary

#B99E3F

accent

#C63BED

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#070610

muted

#7A7A7F

Preview Lab

Preview with #172F85

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

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