#1728A0#1728A0

#1728A0 is a dark, vivid blue. Relative luminance 0.042; OKLCH L 36.5% C 0.190 H 267.5°. Best body text is #FFFFFF at 11.37:1 contrast (WCAG AA passes).

Color values

HEX	#1728A0
RGB	rgb(23, 40, 160)
HSL	hsl(233, 75%, 36%)
HSV	hsv(233, 86%, 63%)
CMYK	cmyk(85.6%, 75%, 0%, 37.3%)
CIE-LAB	lab(24.44, 39.72, -65.53)
CIE-LCH	lch(24.44, 76.63, 301.22°)
OKLab	oklab(36.5% -0.0082 -0.19)
OKLCH	oklch(36.5% 0.19 267.5)
XYZ	xyz(7.4551, 4.2369, 33.6758)
Luminance	0.0424 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1728A0 #A08F17

analogous

#176CA0 #1728A0 #4A17A0

triadic

#1728A0 #A01728 #28A017

tetradic

#1728A0 #A0176C #A08F17 #17A04A

square

#1728A0 #A0176C #A08F17 #17A04A

split-complementary

#1728A0 #A04A17 #6CA017

monochromatic

#080D35 #0F1B6A #1728A0 #1F35D6 #4C5FE5

Accessibility & contrast

On white

11.37

#1728A0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.85

#1728A0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1728A0

11.37:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1728A0	#FFFFFF	#000000	##FFFFFF
##1728A0	1.00	11.37	1.85	11.37
#FFFFFF	11.37	1.00	21.00	1.00
#000000	1.85	21.00	1.00	21.00
##FFFFFF	11.37	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0041A4

Deuteranopia (green-blind)

#00339E

Tritanopia (blue-blind)

#004B62

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #1728a0;
/* rgb */ color: rgb(23, 40, 160);
/* oklch */ color: oklch(36.5% 0.190 267.5);

Tailwind

colors: {
  custom: {
    50: '#7163bd',
    500: '#1728a0',
    950: '#000000',
  },
}

SCSS

$custom: #1728a0;
$custom-light: #7163bd;
$custom-dark: #000000;

JSON

{
  "hex": "#1728a0",
  "rgb": {
    "r": 23,
    "g": 40,
    "b": 160
  },
  "hsl": {
    "h": 232.555,
    "s": 74.863,
    "l": 35.882
  },
  "oklch": {
    "l": 0.36501,
    "c": 0.19015,
    "h": 267.5
  },
  "luminance": 0.04238
}

Semantic roles & 50–950 ramp

primary

#1728A0

secondary

#C7B84C

accent

#DA36F1

background

#F7F5FB

surface

#EEEAF7

border

#C9C6D0

text

#090512

muted

#7B7981

Preview Lab

Preview with #1728A0

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

Preview Lab → · Contrast checker → · Palette generator →