#172E8F#172E8F

#172E8F is a dark, vivid blue. Relative luminance 0.041; OKLCH L 35.7% C 0.162 H 266.8°. Best body text is #FFFFFF at 11.51:1 contrast (WCAG AA passes).

Color values

HEX	#172E8F
RGB	rgb(23, 46, 143)
HSL	hsl(229, 72%, 33%)
HSV	hsv(229, 84%, 56%)
CMYK	cmyk(83.9%, 67.8%, 0%, 43.9%)
CIE-LAB	lab(24.06, 29.53, -55.72)
CIE-LCH	lch(24.06, 63.06, 297.93°)
OKLab	oklab(35.69% -0.009 -0.1614)
OKLCH	oklch(35.69% 0.162 266.8)
XYZ	xyz(6.2865, 4.1186, 26.4449)
Luminance	0.0412 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172E8F #8F7817

analogous

#176A8F #172E8F #3C178F

triadic

#172E8F #8F172E #2E8F17

tetradic

#172E8F #8F176A #8F7817 #178F3C

square

#172E8F #8F176A #8F7817 #178F3C

split-complementary

#172E8F #8F3C17 #6A8F17

monochromatic

#060C26 #0F1D5A #172E8F #1F3FC4 #405FE0

Accessibility & contrast

On white

11.51

#172E8F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.82

#172E8F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172E8F

11.51:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172E8F	#FFFFFF	#000000	##FFFFFF
##172E8F	1.00	11.51	1.82	11.51
#FFFFFF	11.51	1.00	21.00	1.00
#000000	1.82	21.00	1.00	21.00
##FFFFFF	11.51	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003F92

Deuteranopia (green-blind)

#00348D

Tritanopia (blue-blind)

#00485A

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #172e8f;
/* rgb */ color: rgb(23, 46, 143);
/* oklch */ color: oklch(35.7% 0.162 266.8);

Tailwind

colors: {
  custom: {
    50: '#6c66b1',
    500: '#172e8f',
    950: '#000000',
  },
}

SCSS

$custom: #172e8f;
$custom-light: #6c66b1;
$custom-dark: #000000;

JSON

{
  "hex": "#172e8f",
  "rgb": {
    "r": 23,
    "g": 46,
    "b": 143
  },
  "hsl": {
    "h": 228.5,
    "s": 72.289,
    "l": 32.549
  },
  "oklch": {
    "l": 0.35693,
    "c": 0.16165,
    "h": 266.8
  },
  "luminance": 0.04119
}

Semantic roles & 50–950 ramp

primary

#172E8F

secondary

#C1A841

accent

#CC39EF

background

#F7F6FB

surface

#EDEBF6

border

#C8C6D0

text

#080611

muted

#7B7A80

Preview Lab

Preview with #172E8F

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

Preview Lab → · Contrast checker → · Palette generator →