#172D80#172D80

#172D80 is a dark, vivid blue. Relative luminance 0.036; OKLCH L 34.0% C 0.142 H 266.8°. Best body text is #FFFFFF at 12.19:1 contrast (WCAG AA passes).

Color values

HEX	#172D80
RGB	rgb(23, 45, 128)
HSL	hsl(227, 70%, 30%)
HSV	hsv(227, 82%, 50%)
CMYK	cmyk(82%, 64.8%, 0%, 49.8%)
CIE-LAB	lab(22.36, 24.30, -49.12)
CIE-LCH	lch(22.36, 54.80, 296.32°)
OKLab	oklab(34% -0.008 -0.1421)
OKLCH	oklch(34% 0.142 266.8)
XYZ	xyz(5.1867, 3.6168, 20.8427)
Luminance	0.0362 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172D80 #806A17

analogous

#176180 #172D80 #361780

triadic

#172D80 #80172D #2D8017

tetradic

#172D80 #801761 #806A17 #178036

square

#172D80 #801761 #806A17 #178036

split-complementary

#172D80 #803617 #618017

monochromatic

#05091A #0E1B4C #172D80 #203FB4 #3659DB

Accessibility & contrast

On white

12.19

#172D80 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.72

#172D80 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172D80

12.19:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172D80	#FFFFFF	#000000	##FFFFFF
##172D80	1.00	12.19	1.72	12.19
#FFFFFF	12.19	1.00	21.00	1.00
#000000	1.72	21.00	1.00	21.00
##FFFFFF	12.19	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003B83

Deuteranopia (green-blind)

#00317E

Tritanopia (blue-blind)

#004352

Achromatopsia (no color)

#353535

Design tokens & code

CSS

--color: #172d80;
/* rgb */ color: rgb(23, 45, 128);
/* oklch */ color: oklch(34.0% 0.142 266.8);

Tailwind

colors: {
  custom: {
    50: '#6865a6',
    500: '#172d80',
    950: '#000000',
  },
}

SCSS

$custom: #172d80;
$custom-light: #6865a6;
$custom-dark: #000000;

JSON

{
  "hex": "#172d80",
  "rgb": {
    "r": 23,
    "g": 45,
    "b": 128
  },
  "hsl": {
    "h": 227.429,
    "s": 69.536,
    "l": 29.608
  },
  "oklch": {
    "l": 0.34004,
    "c": 0.14235,
    "h": 266.8
  },
  "luminance": 0.03617
}

Semantic roles & 50–950 ramp

primary

#172D80

secondary

#B49C3E

accent

#C73BEC

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#07050F

muted

#7A7A7F

Preview Lab

Preview with #172D80

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

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