#172FB4#172FB4

#172FB4 is a dark, highly saturated blue. Relative luminance 0.055; OKLCH L 39.8% C 0.208 H 266.6°. Best body text is #FFFFFF at 9.99:1 contrast (WCAG AA passes).

Color values

HEX	#172FB4
RGB	rgb(23, 47, 180)
HSL	hsl(231, 77%, 40%)
HSV	hsv(231, 87%, 71%)
CMYK	cmyk(87.2%, 73.9%, 0%, 29.4%)
CIE-LAB	lab(28.14, 42.64, -71.46)
CIE-LCH	lch(28.14, 83.21, 300.83°)
OKLab	oklab(39.8% -0.0124 -0.2072)
OKLCH	oklch(39.8% 0.208 266.6)
XYZ	xyz(9.6052, 5.5093, 43.7283)
Luminance	0.0551 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172FB4 #B49C17

analogous

#177EB4 #172FB4 #4E17B4

triadic

#172FB4 #B4172F #2FB417

tetradic

#172FB4 #B4177E #B49C17 #17B44E

square

#172FB4 #B4177E #B49C17 #17B44E

split-complementary

#172FB4 #B44E17 #7EB417

monochromatic

#091347 #10217E #172FB4 #2542E3 #5B71EA

Accessibility & contrast

On white

9.99

#172FB4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.10

#172FB4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172FB4

9.99:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172FB4	#FFFFFF	#000000	##FFFFFF
##172FB4	1.00	9.99	2.10	9.99
#FFFFFF	9.99	1.00	21.00	1.00
#000000	2.10	21.00	1.00	21.00
##FFFFFF	9.99	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004AB8

Deuteranopia (green-blind)

#003BB2

Tritanopia (blue-blind)

#00566F

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #172fb4;
/* rgb */ color: rgb(23, 47, 180);
/* oklch */ color: oklch(39.8% 0.208 266.6);

Tailwind

colors: {
  custom: {
    50: '#7668cc',
    500: '#172fb4',
    950: '#000000',
  },
}

SCSS

$custom: #172fb4;
$custom-light: #7668cc;
$custom-dark: #000000;

JSON

{
  "hex": "#172fb4",
  "rgb": {
    "r": 23,
    "g": 47,
    "b": 180
  },
  "hsl": {
    "h": 230.828,
    "s": 77.34,
    "l": 39.804
  },
  "oklch": {
    "l": 0.39795,
    "c": 0.20758,
    "h": 266.6
  },
  "luminance": 0.0551
}

Semantic roles & 50–950 ramp

primary

#172FB4

secondary

#CEBC59

accent

#D734F4

background

#F8F6FC

surface

#EFEBF9

border

#CAC6D2

text

#0B0614

muted

#7C7A82

Preview Lab

Preview with #172FB4

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

Preview Lab → · Contrast checker → · Palette generator →