#172A81#172A81

#172A81 is a dark, vivid blue. Relative luminance 0.034; OKLCH L 33.5% C 0.147 H 267.6°. Best body text is #FFFFFF at 12.47:1 contrast (WCAG AA passes).

Color values

HEX	#172A81
RGB	rgb(23, 42, 129)
HSL	hsl(229, 70%, 30%)
HSV	hsv(229, 82%, 51%)
CMYK	cmyk(82.2%, 67.4%, 0%, 49.4%)
CIE-LAB	lab(21.66, 26.77, -50.90)
CIE-LCH	lch(21.66, 57.51, 297.74°)
OKLab	oklab(33.52% -0.0062 -0.1474)
OKLCH	oklch(33.52% 0.147 267.6)
XYZ	xyz(5.1424, 3.4225, 21.1542)
Luminance	0.0342 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172A81 #816E17

analogous

#175F81 #172A81 #391781

triadic

#172A81 #81172A #2A8117

tetradic

#172A81 #81175F #816E17 #178139

square

#172A81 #81175F #816E17 #178139

split-complementary

#172A81 #813917 #5F8117

monochromatic

#05081A #0E194D #172A81 #203BB5 #3755DB

Accessibility & contrast

On white

12.47

#172A81 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.68

#172A81 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172A81

12.47:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172A81	#FFFFFF	#000000	##FFFFFF
##172A81	1.00	12.47	1.68	12.47
#FFFFFF	12.47	1.00	21.00	1.00
#000000	1.68	21.00	1.00	21.00
##FFFFFF	12.47	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003984

Deuteranopia (green-blind)

#002F7F

Tritanopia (blue-blind)

#004151

Achromatopsia (no color)

#343434

Design tokens & code

CSS

--color: #172a81;
/* rgb */ color: rgb(23, 42, 129);
/* oklch */ color: oklch(33.5% 0.147 267.6);

Tailwind

colors: {
  custom: {
    50: '#6863a6',
    500: '#172a81',
    950: '#000000',
  },
}

SCSS

$custom: #172a81;
$custom-light: #6863a6;
$custom-dark: #000000;

JSON

{
  "hex": "#172a81",
  "rgb": {
    "r": 23,
    "g": 42,
    "b": 129
  },
  "hsl": {
    "h": 229.245,
    "s": 69.737,
    "l": 29.804
  },
  "oklch": {
    "l": 0.33518,
    "c": 0.14749,
    "h": 267.6
  },
  "luminance": 0.03423
}

Semantic roles & 50–950 ramp

primary

#172A81

secondary

#B5A03E

accent

#CD3BED

background

#F6F5FA

surface

#ECEAF4

border

#C7C6CE

text

#07050F

muted

#7A797F

Preview Lab

Preview with #172A81

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

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