#17378A#17378A

#17378A is a dark, vivid blue. Relative luminance 0.048; OKLCH L 37.0% C 0.144 H 264.4°. Best body text is #FFFFFF at 10.77:1 contrast (WCAG AA passes).

Color values

HEX	#17378A
RGB	rgb(23, 55, 138)
HSL	hsl(223, 71%, 32%)
HSV	hsv(223, 83%, 54%)
CMYK	cmyk(83.3%, 60.1%, 0%, 45.9%)
CIE-LAB	lab(26.01, 21.34, -49.43)
CIE-LCH	lch(26.01, 53.84, 293.36°)
OKLab	oklab(36.99% -0.0141 -0.1429)
OKLCH	oklch(36.99% 0.144 264.4)
XYZ	xyz(6.3054, 4.7488, 24.6241)
Luminance	0.0475 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#17378A #8A6A17

analogous

#17718A #17378A #30178A

triadic

#17378A #8A1737 #378A17

tetradic

#17378A #8A1771 #8A6A17 #178A30

square

#17378A #8A1771 #8A6A17 #178A30

split-complementary

#17378A #8A3017 #718A17

monochromatic

#060D21 #0E2256 #17378A #204CBE #3D6ADF

Accessibility & contrast

On white

10.77

#17378A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.95

#17378A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #17378A

10.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##17378A	#FFFFFF	#000000	##FFFFFF
##17378A	1.00	10.77	1.95	10.77
#FFFFFF	10.77	1.00	21.00	1.00
#000000	1.95	21.00	1.00	21.00
##FFFFFF	10.77	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00438D

Deuteranopia (green-blind)

#003888

Tritanopia (blue-blind)

#004C5B

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #17378a;
/* rgb */ color: rgb(23, 55, 138);
/* oklch */ color: oklch(37.0% 0.144 264.4);

Tailwind

colors: {
  custom: {
    50: '#6a6dad',
    500: '#17378a',
    950: '#000000',
  },
}

SCSS

$custom: #17378a;
$custom-light: #6a6dad;
$custom-dark: #000000;

JSON

{
  "hex": "#17378a",
  "rgb": {
    "r": 23,
    "g": 55,
    "b": 138
  },
  "hsl": {
    "h": 223.304,
    "s": 71.429,
    "l": 31.569
  },
  "oklch": {
    "l": 0.36995,
    "c": 0.14357,
    "h": 264.4
  },
  "luminance": 0.0475
}

Semantic roles & 50–950 ramp

primary

#17378A

secondary

#BE9A3F

accent

#BC3AEE

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#070710

muted

#7A7A7F

Preview Lab

Preview with #17378A

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

Preview Lab → · Contrast checker → · Palette generator →