#172B75#172B75

#172B75 is a dark, vivid blue. Relative luminance 0.032; OKLCH L 32.5% C 0.129 H 267.1°. Best body text is #FFFFFF at 12.81:1 contrast (WCAG AA passes).

Color values

HEX	#172B75
RGB	rgb(23, 43, 117)
HSL	hsl(227, 67%, 27%)
HSV	hsv(227, 80%, 46%)
CMYK	cmyk(80.3%, 63.2%, 0%, 54.1%)
CIE-LAB	lab(20.80, 21.26, -44.68)
CIE-LCH	lch(20.80, 49.48, 295.45°)
OKLab	oklab(32.54% -0.0066 -0.1291)
OKLCH	oklch(32.54% 0.129 267.1)
XYZ	xyz(4.4270, 3.1938, 17.2093)
Luminance	0.0319 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172B75 #756117

analogous

#175A75 #172B75 #321775

triadic

#172B75 #75172B #2B7517

tetradic

#172B75 #75175A #756117 #177532

square

#172B75 #75175A #756117 #177532

split-complementary

#172B75 #753217 #5A7517

monochromatic

#05091A #0D1842 #172B75 #213EA8 #3053D6

Accessibility & contrast

On white

12.81

#172B75 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.64

#172B75 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172B75

12.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172B75	#FFFFFF	#000000	##FFFFFF
##172B75	1.00	12.81	1.64	12.81
#FFFFFF	12.81	1.00	21.00	1.00
#000000	1.64	21.00	1.00	21.00
##FFFFFF	12.81	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003777

Deuteranopia (green-blind)

#002E74

Tritanopia (blue-blind)

#003E4B

Achromatopsia (no color)

#323232

Design tokens & code

CSS

--color: #172b75;
/* rgb */ color: rgb(23, 43, 117);
/* oklch */ color: oklch(32.5% 0.129 267.1);

Tailwind

colors: {
  custom: {
    50: '#65649d',
    500: '#172b75',
    950: '#000000',
  },
}

SCSS

$custom: #172b75;
$custom-light: #65649d;
$custom-dark: #000000;

JSON

{
  "hex": "#172b75",
  "rgb": {
    "r": 23,
    "g": 43,
    "b": 117
  },
  "hsl": {
    "h": 227.234,
    "s": 67.143,
    "l": 27.451
  },
  "oklch": {
    "l": 0.32537,
    "c": 0.1293,
    "h": 267.1
  },
  "luminance": 0.03194
}

Semantic roles & 50–950 ramp

primary

#172B75

secondary

#AA933D

accent

#C53EEA

background

#F6F5F9

surface

#EBEAF2

border

#C6C6CC

text

#06050E

muted

#7A797E

Preview Lab

Preview with #172B75

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

Preview Lab → · Contrast checker → · Palette generator →