#172A83#172A83

#172A83 is a dark, vivid blue. Relative luminance 0.035; OKLCH L 33.7% C 0.150 H 267.6°. Best body text is #FFFFFF at 12.39:1 contrast (WCAG AA passes).

Color values

HEX	#172A83
RGB	rgb(23, 42, 131)
HSL	hsl(229, 70%, 30%)
HSV	hsv(229, 82%, 51%)
CMYK	cmyk(82.4%, 67.9%, 0%, 48.6%)
CIE-LAB	lab(21.86, 27.56, -51.84)
CIE-LCH	lch(21.86, 58.71, 298.00°)
OKLab	oklab(33.72% -0.0063 -0.1501)
OKLCH	oklch(33.72% 0.15 267.6)
XYZ	xyz(5.2766, 3.4762, 21.8612)
Luminance	0.0348 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172A83 #837017

analogous

#176083 #172A83 #3A1783

triadic

#172A83 #83172A #2A8317

tetradic

#172A83 #831760 #837017 #17833A

square

#172A83 #831760 #837017 #17833A

split-complementary

#172A83 #833A17 #608317

monochromatic

#05091B #0E194F #172A83 #203BB7 #3855DC

Accessibility & contrast

On white

12.39

#172A83 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.70

#172A83 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172A83

12.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172A83	#FFFFFF	#000000	##FFFFFF
##172A83	1.00	12.39	1.70	12.39
#FFFFFF	12.39	1.00	21.00	1.00
#000000	1.70	21.00	1.00	21.00
##FFFFFF	12.39	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003A86

Deuteranopia (green-blind)

#002F81

Tritanopia (blue-blind)

#004252

Achromatopsia (no color)

#343434

Design tokens & code

CSS

--color: #172a83;
/* rgb */ color: rgb(23, 42, 131);
/* oklch */ color: oklch(33.7% 0.150 267.6);

Tailwind

colors: {
  custom: {
    50: '#6963a8',
    500: '#172a83',
    950: '#000000',
  },
}

SCSS

$custom: #172a83;
$custom-light: #6963a8;
$custom-dark: #000000;

JSON

{
  "hex": "#172a83",
  "rgb": {
    "r": 23,
    "g": 42,
    "b": 131
  },
  "hsl": {
    "h": 229.444,
    "s": 70.13,
    "l": 30.196
  },
  "oklch": {
    "l": 0.33721,
    "c": 0.15023,
    "h": 267.6
  },
  "luminance": 0.03477
}

Semantic roles & 50–950 ramp

primary

#172A83

secondary

#B7A23F

accent

#CE3BED

background

#F6F5FA

surface

#ECEAF4

border

#C7C6CE

text

#070510

muted

#7A797F

Preview Lab

Preview with #172A83

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

Preview Lab → · Contrast checker → · Palette generator →