#173780#173780

#173780 is a dark, vivid blue. Relative luminance 0.045; OKLCH L 36.1% C 0.129 H 263.4°. Best body text is #FFFFFF at 11.08:1 contrast (WCAG AA passes).

Color values

HEX	#173780
RGB	rgb(23, 55, 128)
HSL	hsl(222, 70%, 30%)
HSV	hsv(222, 82%, 50%)
CMYK	cmyk(82%, 57%, 0%, 49.8%)
CIE-LAB	lab(25.18, 17.25, -44.53)
CIE-LCH	lch(25.18, 47.76, 291.17°)
OKLab	oklab(36.11% -0.0148 -0.1285)
OKLCH	oklch(36.11% 0.129 263.4)
XYZ	xyz(5.6144, 4.4724, 20.9852)
Luminance	0.0447 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173780 #806017

analogous

#176C80 #173780 #2B1780

triadic

#173780 #801737 #378017

tetradic

#173780 #80176C #806017 #17802B

square

#173780 #80176C #806017 #17802B

split-complementary

#173780 #802B17 #6C8017

monochromatic

#050B1A #0E214C #173780 #204DB4 #3669DB

Accessibility & contrast

On white

11.08

#173780 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.89

#173780 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173780

11.08:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173780	#FFFFFF	#000000	##FFFFFF
##173780	1.00	11.08	1.89	11.08
#FFFFFF	11.08	1.00	21.00	1.00
#000000	1.89	21.00	1.00	21.00
##FFFFFF	11.08	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004183

Deuteranopia (green-blind)

#00377F

Tritanopia (blue-blind)

#004956

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #173780;
/* rgb */ color: rgb(23, 55, 128);
/* oklch */ color: oklch(36.1% 0.129 263.4);

Tailwind

colors: {
  custom: {
    50: '#676da5',
    500: '#173780',
    950: '#000000',
  },
}

SCSS

$custom: #173780;
$custom-light: #676da5;
$custom-dark: #000000;

JSON

{
  "hex": "#173780",
  "rgb": {
    "r": 23,
    "g": 55,
    "b": 128
  },
  "hsl": {
    "h": 221.714,
    "s": 69.536,
    "l": 29.608
  },
  "oklch": {
    "l": 0.36109,
    "c": 0.12935,
    "h": 263.4
  },
  "luminance": 0.04473
}

Semantic roles & 50–950 ramp

primary

#173780

secondary

#B4903E

accent

#B63BEC

background

#F6F6FA

surface

#EBEBF4

border

#C6C6CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #173780

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

Preview Lab → · Contrast checker → · Palette generator →