#172EB4#172EB4

#172EB4 is a dark, highly saturated blue. Relative luminance 0.054; OKLCH L 39.6% C 0.209 H 266.7°. Best body text is #FFFFFF at 10.07:1 contrast (WCAG AA passes).

Color values

HEX	#172EB4
RGB	rgb(23, 46, 180)
HSL	hsl(231, 77%, 40%)
HSV	hsv(231, 87%, 71%)
CMYK	cmyk(87.2%, 74.4%, 0%, 29.4%)
CIE-LAB	lab(27.93, 43.24, -71.81)
CIE-LCH	lch(27.93, 83.82, 301.05°)
OKLab	oklab(39.64% -0.0121 -0.2082)
OKLCH	oklch(39.64% 0.209 266.7)
XYZ	xyz(9.5657, 5.4302, 43.7151)
Luminance	0.0543 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172EB4 #B49D17

analogous

#177DB4 #172EB4 #4E17B4

triadic

#172EB4 #B4172E #2EB417

tetradic

#172EB4 #B4177D #B49D17 #17B44E

square

#172EB4 #B4177D #B49D17 #17B44E

split-complementary

#172EB4 #B44E17 #7DB417

monochromatic

#091247 #10207E #172EB4 #2541E3 #5B70EA

Accessibility & contrast

On white

10.07

#172EB4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.09

#172EB4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172EB4

10.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172EB4	#FFFFFF	#000000	##FFFFFF
##172EB4	1.00	10.07	2.09	10.07
#FFFFFF	10.07	1.00	21.00	1.00
#000000	2.09	21.00	1.00	21.00
##FFFFFF	10.07	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004AB8

Deuteranopia (green-blind)

#003AB2

Tritanopia (blue-blind)

#00566F

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #172eb4;
/* rgb */ color: rgb(23, 46, 180);
/* oklch */ color: oklch(39.6% 0.209 266.7);

Tailwind

colors: {
  custom: {
    50: '#7668cc',
    500: '#172eb4',
    950: '#000000',
  },
}

SCSS

$custom: #172eb4;
$custom-light: #7668cc;
$custom-dark: #000000;

JSON

{
  "hex": "#172eb4",
  "rgb": {
    "r": 23,
    "g": 46,
    "b": 180
  },
  "hsl": {
    "h": 231.21,
    "s": 77.34,
    "l": 39.804
  },
  "oklch": {
    "l": 0.39643,
    "c": 0.20857,
    "h": 266.7
  },
  "luminance": 0.05431
}

Semantic roles & 50–950 ramp

primary

#172EB4

secondary

#CEBD59

accent

#D834F4

background

#F8F6FC

surface

#EFEBF9

border

#CAC6D2

text

#0B0614

muted

#7C7A82

Preview Lab

Preview with #172EB4

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

Preview Lab → · Contrast checker → · Palette generator →