#172F8E#172F8E

#172F8E is a dark, vivid blue. Relative luminance 0.042; OKLCH L 35.8% C 0.159 H 266.6°. Best body text is #FFFFFF at 11.45:1 contrast (WCAG AA passes).

Color values

HEX	#172F8E
RGB	rgb(23, 47, 142)
HSL	hsl(228, 72%, 32%)
HSV	hsv(228, 84%, 56%)
CMYK	cmyk(83.8%, 66.9%, 0%, 44.3%)
CIE-LAB	lab(24.22, 28.47, -54.84)
CIE-LCH	lch(24.22, 61.79, 297.44°)
OKLab	oklab(35.78% -0.0095 -0.1588)
OKLCH	oklch(35.78% 0.159 266.6)
XYZ	xyz(6.2506, 4.1674, 26.0609)
Luminance	0.0417 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172F8E #8E7617

analogous

#176B8E #172F8E #3A178E

triadic

#172F8E #8E172F #2F8E17

tetradic

#172F8E #8E176B #8E7617 #178E3A

square

#172F8E #8E176B #8E7617 #178E3A

split-complementary

#172F8E #8E3A17 #6B8E17

monochromatic

#060C25 #0E1E59 #172F8E #2040C3 #3F60E0

Accessibility & contrast

On white

11.45

#172F8E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.83

#172F8E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172F8E

11.45:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172F8E	#FFFFFF	#000000	##FFFFFF
##172F8E	1.00	11.45	1.83	11.45
#FFFFFF	11.45	1.00	21.00	1.00
#000000	1.83	21.00	1.00	21.00
##FFFFFF	11.45	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003F91

Deuteranopia (green-blind)

#00348C

Tritanopia (blue-blind)

#00495A

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #172f8e;
/* rgb */ color: rgb(23, 47, 142);
/* oklch */ color: oklch(35.8% 0.159 266.6);

Tailwind

colors: {
  custom: {
    50: '#6b67b0',
    500: '#172f8e',
    950: '#000000',
  },
}

SCSS

$custom: #172f8e;
$custom-light: #6b67b0;
$custom-dark: #000000;

JSON

{
  "hex": "#172f8e",
  "rgb": {
    "r": 23,
    "g": 47,
    "b": 142
  },
  "hsl": {
    "h": 227.899,
    "s": 72.121,
    "l": 32.353
  },
  "oklch": {
    "l": 0.35779,
    "c": 0.1591,
    "h": 266.6
  },
  "luminance": 0.04168
}

Semantic roles & 50–950 ramp

primary

#172F8E

secondary

#C0A740

accent

#CA39EF

background

#F7F6FA

surface

#EDEBF5

border

#C8C6CF

text

#080611

muted

#7B7A80

Preview Lab

Preview with #172F8E

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

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