#172F83#172F83

#172F83 is a dark, vivid blue. Relative luminance 0.039; OKLCH L 34.7% C 0.144 H 266.3°. Best body text is #FFFFFF at 11.86:1 contrast (WCAG AA passes).

Color values

HEX	#172F83
RGB	rgb(23, 47, 131)
HSL	hsl(227, 70%, 30%)
HSV	hsv(227, 82%, 51%)
CMYK	cmyk(82.4%, 64.1%, 0%, 48.6%)
CIE-LAB	lab(23.18, 24.11, -49.67)
CIE-LCH	lch(23.18, 55.21, 295.89°)
OKLab	oklab(34.7% -0.0092 -0.1437)
OKLCH	oklch(34.7% 0.144 266.3)
XYZ	xyz(5.4652, 3.8532, 21.9240)
Luminance	0.0385 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172F83 #836B17

analogous

#176583 #172F83 #351783

triadic

#172F83 #83172F #2F8317

tetradic

#172F83 #831765 #836B17 #178335

square

#172F83 #831765 #836B17 #178335

split-complementary

#172F83 #833517 #658317

monochromatic

#050A1B #0E1C4F #172F83 #2042B7 #385DDC

Accessibility & contrast

On white

11.86

#172F83 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.77

#172F83 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172F83

11.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172F83	#FFFFFF	#000000	##FFFFFF
##172F83	1.00	11.86	1.77	11.86
#FFFFFF	11.86	1.00	21.00	1.00
#000000	1.77	21.00	1.00	21.00
##FFFFFF	11.86	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003C86

Deuteranopia (green-blind)

#003281

Tritanopia (blue-blind)

#004554

Achromatopsia (no color)

#373737

Design tokens & code

CSS

--color: #172f83;
/* rgb */ color: rgb(23, 47, 131);
/* oklch */ color: oklch(34.7% 0.144 266.3);

Tailwind

colors: {
  custom: {
    50: '#6867a8',
    500: '#172f83',
    950: '#000000',
  },
}

SCSS

$custom: #172f83;
$custom-light: #6867a8;
$custom-dark: #000000;

JSON

{
  "hex": "#172f83",
  "rgb": {
    "r": 23,
    "g": 47,
    "b": 131
  },
  "hsl": {
    "h": 226.667,
    "s": 70.13,
    "l": 30.196
  },
  "oklch": {
    "l": 0.34696,
    "c": 0.14401,
    "h": 266.3
  },
  "luminance": 0.03854
}

Semantic roles & 50–950 ramp

primary

#172F83

secondary

#B79C3F

accent

#C53BED

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#070610

muted

#7A7A7F

Preview Lab

Preview with #172F83

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

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