#172B7E#172B7E

#172B7E is a dark, vivid blue. Relative luminance 0.034; OKLCH L 33.4% C 0.142 H 267.3°. Best body text is #FFFFFF at 12.48:1 contrast (WCAG AA passes).

Color values

HEX	#172B7E
RGB	rgb(23, 43, 126)
HSL	hsl(228, 69%, 29%)
HSV	hsv(228, 82%, 49%)
CMYK	cmyk(81.7%, 65.9%, 0%, 50.6%)
CIE-LAB	lab(21.64, 24.89, -49.05)
CIE-LCH	lch(21.64, 55.00, 296.91°)
OKLab	oklab(33.41% -0.0067 -0.1419)
OKLCH	oklch(33.41% 0.142 267.3)
XYZ	xyz(4.9818, 3.4157, 20.1314)
Luminance	0.0342 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172B7E #7E6A17

analogous

#175F7E #172B7E #37177E

triadic

#172B7E #7E172B #2B7E17

tetradic

#172B7E #7E175F #7E6A17 #177E37

square

#172B7E #7E175F #7E6A17 #177E37

split-complementary

#172B7E #7E3717 #5F7E17

monochromatic

#05091A #0E194A #172B7E #203DB2 #3555DA

Accessibility & contrast

On white

12.48

#172B7E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.68

#172B7E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172B7E

12.48:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172B7E	#FFFFFF	#000000	##FFFFFF
##172B7E	1.00	12.48	1.68	12.48
#FFFFFF	12.48	1.00	21.00	1.00
#000000	1.68	21.00	1.00	21.00
##FFFFFF	12.48	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003981

Deuteranopia (green-blind)

#002F7C

Tritanopia (blue-blind)

#004150

Achromatopsia (no color)

#343434

Design tokens & code

CSS

--color: #172b7e;
/* rgb */ color: rgb(23, 43, 126);
/* oklch */ color: oklch(33.4% 0.142 267.3);

Tailwind

colors: {
  custom: {
    50: '#6764a4',
    500: '#172b7e',
    950: '#000000',
  },
}

SCSS

$custom: #172b7e;
$custom-light: #6764a4;
$custom-dark: #000000;

JSON

{
  "hex": "#172b7e",
  "rgb": {
    "r": 23,
    "g": 43,
    "b": 126
  },
  "hsl": {
    "h": 228.35,
    "s": 69.128,
    "l": 29.216
  },
  "oklch": {
    "l": 0.33411,
    "c": 0.14209,
    "h": 267.3
  },
  "luminance": 0.03416
}

Semantic roles & 50–950 ramp

primary

#172B7E

secondary

#B39C3E

accent

#CA3CEC

background

#F6F5FA

surface

#EBEAF4

border

#C6C6CE

text

#07050F

muted

#7A797F

Preview Lab

Preview with #172B7E

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

Preview Lab → · Contrast checker → · Palette generator →