#172E81#172E81

#172E81 is a dark, vivid blue. Relative luminance 0.037; OKLCH L 34.3% C 0.142 H 266.5°. Best body text is #FFFFFF at 12.04:1 contrast (WCAG AA passes).

Color values

HEX	#172E81
RGB	rgb(23, 46, 129)
HSL	hsl(227, 70%, 30%)
HSV	hsv(227, 82%, 51%)
CMYK	cmyk(82.2%, 64.3%, 0%, 49.4%)
CIE-LAB	lab(22.73, 24.00, -49.16)
CIE-LCH	lch(22.73, 54.70, 296.02°)
OKLab	oklab(34.3% -0.0086 -0.1422)
OKLCH	oklch(34.3% 0.142 266.5)
XYZ	xyz(5.2914, 3.7205, 21.2039)
Luminance	0.0372 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172E81 #816A17

analogous

#176381 #172E81 #351781

triadic

#172E81 #81172E #2E8117

tetradic

#172E81 #811763 #816A17 #178135

square

#172E81 #811763 #816A17 #178135

split-complementary

#172E81 #813517 #638117

monochromatic

#05091A #0E1B4D #172E81 #2041B5 #375BDB

Accessibility & contrast

On white

12.04

#172E81 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.74

#172E81 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172E81

12.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172E81	#FFFFFF	#000000	##FFFFFF
##172E81	1.00	12.04	1.74	12.04
#FFFFFF	12.04	1.00	21.00	1.00
#000000	1.74	21.00	1.00	21.00
##FFFFFF	12.04	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003B84

Deuteranopia (green-blind)

#00317F

Tritanopia (blue-blind)

#004453

Achromatopsia (no color)

#363636

Design tokens & code

CSS

--color: #172e81;
/* rgb */ color: rgb(23, 46, 129);
/* oklch */ color: oklch(34.3% 0.142 266.5);

Tailwind

colors: {
  custom: {
    50: '#6866a6',
    500: '#172e81',
    950: '#000000',
  },
}

SCSS

$custom: #172e81;
$custom-light: #6866a6;
$custom-dark: #000000;

JSON

{
  "hex": "#172e81",
  "rgb": {
    "r": 23,
    "g": 46,
    "b": 129
  },
  "hsl": {
    "h": 226.981,
    "s": 69.737,
    "l": 29.804
  },
  "oklch": {
    "l": 0.34302,
    "c": 0.14248,
    "h": 266.5
  },
  "luminance": 0.03721
}

Semantic roles & 50–950 ramp

primary

#172E81

secondary

#B59C3E

accent

#C63BED

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#07060F

muted

#7A7A7F

Preview Lab

Preview with #172E81

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

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