#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
RGBrgb(23, 55, 138)
HSLhsl(223, 71%, 32%)
HSVhsv(223, 83%, 54%)
CMYKcmyk(83.3%, 60.1%, 0%, 45.9%)
CIE-LABlab(26.01, 21.34, -49.43)
CIE-LCHlch(26.01, 53.84, 293.36°)
OKLaboklab(36.99% -0.0141 -0.1429)
OKLCHoklch(36.99% 0.144 264.4)
XYZxyz(6.3054, 4.7488, 24.6241)
Luminance0.0475 (WCAG relative)
Temperaturecool
Familyblue

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
##17378A1.0010.771.9510.77
#FFFFFF10.771.0021.001.00
#0000001.9521.001.0021.00
##FFFFFF10.771.0021.001.00

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 →

#17378A Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva