#172F81#172F81

#172F81 is a dark, vivid blue. Relative luminance 0.038; OKLCH L 34.5% C 0.141 H 266.3°. Best body text is #FFFFFF at 11.93:1 contrast (WCAG AA passes).

Color values

HEX	#172F81
RGB	rgb(23, 47, 129)
HSL	hsl(226, 70%, 30%)
HSV	hsv(226, 82%, 51%)
CMYK	cmyk(82.2%, 63.6%, 0%, 49.4%)
CIE-LAB	lab(23.00, 23.30, -48.71)
CIE-LCH	lch(23.00, 54.00, 295.56°)
OKLab	oklab(34.5% -0.0092 -0.1409)
OKLCH	oklch(34.5% 0.141 266.3)
XYZ	xyz(5.3309, 3.7995, 21.2170)
Luminance	0.0380 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172F81 #816917

analogous

#176481 #172F81 #341781

triadic

#172F81 #81172F #2F8117

tetradic

#172F81 #811764 #816917 #178134

square

#172F81 #811764 #816917 #178134

split-complementary

#172F81 #813417 #648117

monochromatic

#05091A #0E1C4D #172F81 #2042B5 #375CDB

Accessibility & contrast

On white

11.93

#172F81 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.76

#172F81 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172F81

11.93:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172F81	#FFFFFF	#000000	##FFFFFF
##172F81	1.00	11.93	1.76	11.93
#FFFFFF	11.93	1.00	21.00	1.00
#000000	1.76	21.00	1.00	21.00
##FFFFFF	11.93	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003C84

Deuteranopia (green-blind)

#00327F

Tritanopia (blue-blind)

#004453

Achromatopsia (no color)

#373737

Design tokens & code

CSS

--color: #172f81;
/* rgb */ color: rgb(23, 47, 129);
/* oklch */ color: oklch(34.5% 0.141 266.3);

Tailwind

colors: {
  custom: {
    50: '#6867a6',
    500: '#172f81',
    950: '#000000',
  },
}

SCSS

$custom: #172f81;
$custom-light: #6867a6;
$custom-dark: #000000;

JSON

{
  "hex": "#172f81",
  "rgb": {
    "r": 23,
    "g": 47,
    "b": 129
  },
  "hsl": {
    "h": 226.415,
    "s": 69.737,
    "l": 29.804
  },
  "oklch": {
    "l": 0.34504,
    "c": 0.1412,
    "h": 266.3
  },
  "luminance": 0.038
}

Semantic roles & 50–950 ramp

primary

#172F81

secondary

#B59A3E

accent

#C43BED

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#07060F

muted

#7A7A7F

Preview Lab

Preview with #172F81

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

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