#172F84#172F84

#172F84 is a dark, vivid blue. Relative luminance 0.039; OKLCH L 34.8% C 0.145 H 266.4°. Best body text is #FFFFFF at 11.82:1 contrast (WCAG AA passes).

Color values

HEX	#172F84
RGB	rgb(23, 47, 132)
HSL	hsl(227, 70%, 30%)
HSV	hsv(227, 83%, 52%)
CMYK	cmyk(82.6%, 64.4%, 0%, 48.2%)
CIE-LAB	lab(23.27, 24.51, -50.15)
CIE-LCH	lch(23.27, 55.82, 296.04°)
OKLab	oklab(34.79% -0.0092 -0.1451)
OKLCH	oklch(34.79% 0.145 266.4)
XYZ	xyz(5.5333, 3.8805, 22.2827)
Luminance	0.0388 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172F84 #846C17

analogous

#176584 #172F84 #351784

triadic

#172F84 #84172F #2F8417

tetradic

#172F84 #841765 #846C17 #178435

square

#172F84 #841765 #846C17 #178435

split-complementary

#172F84 #843517 #658417

monochromatic

#050A1C #0E1C50 #172F84 #2042B8 #395DDC

Accessibility & contrast

On white

11.82

#172F84 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.78

#172F84 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172F84

11.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172F84	#FFFFFF	#000000	##FFFFFF
##172F84	1.00	11.82	1.78	11.82
#FFFFFF	11.82	1.00	21.00	1.00
#000000	1.78	21.00	1.00	21.00
##FFFFFF	11.82	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003D87

Deuteranopia (green-blind)

#003282

Tritanopia (blue-blind)

#004555

Achromatopsia (no color)

#373737

Design tokens & code

CSS

--color: #172f84;
/* rgb */ color: rgb(23, 47, 132);
/* oklch */ color: oklch(34.8% 0.145 266.4);

Tailwind

colors: {
  custom: {
    50: '#6967a9',
    500: '#172f84',
    950: '#000000',
  },
}

SCSS

$custom: #172f84;
$custom-light: #6967a9;
$custom-dark: #000000;

JSON

{
  "hex": "#172f84",
  "rgb": {
    "r": 23,
    "g": 47,
    "b": 132
  },
  "hsl": {
    "h": 226.789,
    "s": 70.323,
    "l": 30.392
  },
  "oklch": {
    "l": 0.34792,
    "c": 0.1454,
    "h": 266.4
  },
  "luminance": 0.03881
}

Semantic roles & 50–950 ramp

primary

#172F84

secondary

#B89D3F

accent

#C63BED

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#070610

muted

#7A7A7F

Preview Lab

Preview with #172F84

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

Preview Lab → · Contrast checker → · Palette generator →