#172D9E#172D9E

#172D9E is a dark, vivid blue. Relative luminance 0.045; OKLCH L 37.1% C 0.182 H 267.0°. Best body text is #FFFFFF at 11.02:1 contrast (WCAG AA passes).

Color values

HEX	#172D9E
RGB	rgb(23, 45, 158)
HSL	hsl(230, 75%, 35%)
HSV	hsv(230, 85%, 62%)
CMYK	cmyk(85.4%, 71.5%, 0%, 38%)
CIE-LAB	lab(25.34, 35.89, -62.82)
CIE-LCH	lch(25.34, 72.35, 299.74°)
OKLab	oklab(37.08% -0.0096 -0.1821)
OKLCH	oklch(37.08% 0.182 267)
XYZ	xyz(7.4611, 4.5266, 32.8216)
Luminance	0.0453 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172D9E #9E8817

analogous

#17709E #172D9E #44179E

triadic

#172D9E #9E172D #2D9E17

tetradic

#172D9E #9E1770 #9E8817 #179E44

square

#172D9E #9E1770 #9E8817 #179E44

split-complementary

#172D9E #9E4417 #709E17

monochromatic

#070F33 #0F1E69 #172D9E #1F3CD3 #4B64E5

Accessibility & contrast

On white

11.02

#172D9E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.91

#172D9E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172D9E

11.02:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172D9E	#FFFFFF	#000000	##FFFFFF
##172D9E	1.00	11.02	1.91	11.02
#FFFFFF	11.02	1.00	21.00	1.00
#000000	1.91	21.00	1.00	21.00
##FFFFFF	11.02	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0043A1

Deuteranopia (green-blind)

#00369C

Tritanopia (blue-blind)

#004D62

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #172d9e;
/* rgb */ color: rgb(23, 45, 158);
/* oklch */ color: oklch(37.1% 0.182 267.0);

Tailwind

colors: {
  custom: {
    50: '#7066bc',
    500: '#172d9e',
    950: '#000000',
  },
}

SCSS

$custom: #172d9e;
$custom-light: #7066bc;
$custom-dark: #000000;

JSON

{
  "hex": "#172d9e",
  "rgb": {
    "r": 23,
    "g": 45,
    "b": 158
  },
  "hsl": {
    "h": 230.222,
    "s": 74.586,
    "l": 35.49
  },
  "oklch": {
    "l": 0.37084,
    "c": 0.18238,
    "h": 267
  },
  "luminance": 0.04528
}

Semantic roles & 50–950 ramp

primary

#172D9E

secondary

#C6B24A

accent

#D337F1

background

#F7F6FB

surface

#EDEBF7

border

#C8C6D0

text

#090612

muted

#7B7A81

Preview Lab

Preview with #172D9E

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

Preview Lab → · Contrast checker → · Palette generator →