#172F8F#172F8F

#172F8F is a dark, vivid blue. Relative luminance 0.042; OKLCH L 35.9% C 0.160 H 266.6°. Best body text is #FFFFFF at 11.42:1 contrast (WCAG AA passes).

Color values

HEX	#172F8F
RGB	rgb(23, 47, 143)
HSL	hsl(228, 72%, 33%)
HSV	hsv(228, 84%, 56%)
CMYK	cmyk(83.9%, 67.1%, 0%, 43.9%)
CIE-LAB	lab(24.31, 28.86, -55.30)
CIE-LCH	lch(24.31, 62.38, 297.56°)
OKLab	oklab(35.88% -0.0095 -0.1602)
OKLCH	oklch(35.88% 0.16 266.6)
XYZ	xyz(6.3261, 4.1976, 26.4581)
Luminance	0.0420 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172F8F #8F7717

analogous

#176B8F #172F8F #3B178F

triadic

#172F8F #8F172F #2F8F17

tetradic

#172F8F #8F176B #8F7717 #178F3B

square

#172F8F #8F176B #8F7717 #178F3B

split-complementary

#172F8F #8F3B17 #6B8F17

monochromatic

#060C26 #0F1E5A #172F8F #1F40C4 #4060E0

Accessibility & contrast

On white

11.42

#172F8F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.84

#172F8F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172F8F

11.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172F8F	#FFFFFF	#000000	##FFFFFF
##172F8F	1.00	11.42	1.84	11.42
#FFFFFF	11.42	1.00	21.00	1.00
#000000	1.84	21.00	1.00	21.00
##FFFFFF	11.42	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004092

Deuteranopia (green-blind)

#00348D

Tritanopia (blue-blind)

#00495A

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #172f8f;
/* rgb */ color: rgb(23, 47, 143);
/* oklch */ color: oklch(35.9% 0.160 266.6);

Tailwind

colors: {
  custom: {
    50: '#6c67b1',
    500: '#172f8f',
    950: '#000000',
  },
}

SCSS

$custom: #172f8f;
$custom-light: #6c67b1;
$custom-dark: #000000;

JSON

{
  "hex": "#172f8f",
  "rgb": {
    "r": 23,
    "g": 47,
    "b": 143
  },
  "hsl": {
    "h": 228,
    "s": 72.289,
    "l": 32.549
  },
  "oklch": {
    "l": 0.3588,
    "c": 0.16045,
    "h": 266.6
  },
  "luminance": 0.04198
}

Semantic roles & 50–950 ramp

primary

#172F8F

secondary

#C1A741

accent

#CB39EF

background

#F7F6FB

surface

#EDEBF6

border

#C8C6D0

text

#080611

muted

#7B7A80

Preview Lab

Preview with #172F8F

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

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