#17378E#17378E

#17378E is a dark, vivid blue. Relative luminance 0.049; OKLCH L 37.4% C 0.149 H 264.6°. Best body text is #FFFFFF at 10.64:1 contrast (WCAG AA passes).

Color values

HEX	#17378E
RGB	rgb(23, 55, 142)
HSL	hsl(224, 72%, 32%)
HSV	hsv(224, 84%, 56%)
CMYK	cmyk(83.8%, 61.3%, 0%, 44.3%)
CIE-LAB	lab(26.35, 22.97, -51.34)
CIE-LCH	lch(26.35, 56.24, 294.10°)
OKLab	oklab(37.36% -0.014 -0.1485)
OKLCH	oklch(37.36% 0.149 264.6)
XYZ	xyz(6.6003, 4.8667, 26.1774)
Luminance	0.0487 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#17378E #8E6E17

analogous

#17728E #17378E #33178E

triadic

#17378E #8E1737 #378E17

tetradic

#17378E #8E1772 #8E6E17 #178E33

square

#17378E #8E1772 #8E6E17 #178E33

split-complementary

#17378E #8E3317 #728E17

monochromatic

#060E25 #0E2359 #17378E #204BC3 #3F6BE0

Accessibility & contrast

On white

10.64

#17378E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.97

#17378E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #17378E

10.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##17378E	#FFFFFF	#000000	##FFFFFF
##17378E	1.00	10.64	1.97	10.64
#FFFFFF	10.64	1.00	21.00	1.00
#000000	1.97	21.00	1.00	21.00
##FFFFFF	10.64	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004491

Deuteranopia (green-blind)

#00398C

Tritanopia (blue-blind)

#004D5D

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #17378e;
/* rgb */ color: rgb(23, 55, 142);
/* oklch */ color: oklch(37.4% 0.149 264.6);

Tailwind

colors: {
  custom: {
    50: '#6b6db0',
    500: '#17378e',
    950: '#000000',
  },
}

SCSS

$custom: #17378e;
$custom-light: #6b6db0;
$custom-dark: #000000;

JSON

{
  "hex": "#17378e",
  "rgb": {
    "r": 23,
    "g": 55,
    "b": 142
  },
  "hsl": {
    "h": 223.866,
    "s": 72.121,
    "l": 32.353
  },
  "oklch": {
    "l": 0.3736,
    "c": 0.14915,
    "h": 264.6
  },
  "luminance": 0.04868
}

Semantic roles & 50–950 ramp

primary

#17378E

secondary

#C09E40

accent

#BE39EF

background

#F6F6FA

surface

#ECEBF5

border

#C7C6CF

text

#080711

muted

#7A7A80

Preview Lab

Preview with #17378E

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

Preview Lab → · Contrast checker → · Palette generator →