#172F88#172F88

#172F88 is a dark, vivid blue. Relative luminance 0.040; OKLCH L 35.2% C 0.151 H 266.5°. Best body text is #FFFFFF at 11.68:1 contrast (WCAG AA passes).

Color values

HEX	#172F88
RGB	rgb(23, 47, 136)
HSL	hsl(227, 71%, 31%)
HSV	hsv(227, 83%, 53%)
CMYK	cmyk(83.1%, 65.4%, 0%, 46.7%)
CIE-LAB	lab(23.65, 26.10, -52.04)
CIE-LCH	lch(23.65, 58.22, 296.64°)
OKLab	oklab(35.18% -0.0093 -0.1506)
OKLCH	oklch(35.18% 0.151 266.5)
XYZ	xyz(5.8122, 3.9921, 23.7520)
Luminance	0.0399 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172F88 #887017

analogous

#176788 #172F88 #371788

triadic

#172F88 #88172F #2F8817

tetradic

#172F88 #881767 #887017 #178837

square

#172F88 #881767 #887017 #178837

split-complementary

#172F88 #883717 #678817

monochromatic

#050B1F #0E1D54 #172F88 #2041BC #3B5EDE

Accessibility & contrast

On white

11.68

#172F88 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.80

#172F88 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172F88

11.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172F88	#FFFFFF	#000000	##FFFFFF
##172F88	1.00	11.68	1.80	11.68
#FFFFFF	11.68	1.00	21.00	1.00
#000000	1.80	21.00	1.00	21.00
##FFFFFF	11.68	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003E8B

Deuteranopia (green-blind)

#003386

Tritanopia (blue-blind)

#004757

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #172f88;
/* rgb */ color: rgb(23, 47, 136);
/* oklch */ color: oklch(35.2% 0.151 266.5);

Tailwind

colors: {
  custom: {
    50: '#6a67ac',
    500: '#172f88',
    950: '#000000',
  },
}

SCSS

$custom: #172f88;
$custom-light: #6a67ac;
$custom-dark: #000000;

JSON

{
  "hex": "#172f88",
  "rgb": {
    "r": 23,
    "g": 47,
    "b": 136
  },
  "hsl": {
    "h": 227.257,
    "s": 71.069,
    "l": 31.176
  },
  "oklch": {
    "l": 0.35183,
    "c": 0.15094,
    "h": 266.5
  },
  "luminance": 0.03993
}

Semantic roles & 50–950 ramp

primary

#172F88

secondary

#BCA13F

accent

#C83AEE

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#080610

muted

#7A7A7F

Preview Lab

Preview with #172F88

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

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