#378AD3#378AD3

#378AD3 is a mid, vivid cyan. Relative luminance 0.237; OKLCH L 61.7% C 0.136 H 248.6°. Best body text is #000000 at 5.74:1 contrast (WCAG AA passes).

Color values

HEX#378AD3
RGBrgb(55, 138, 211)
HSLhsl(208, 64%, 52%)
HSVhsv(208, 74%, 83%)
CMYKcmyk(73.9%, 34.6%, 0%, 17.3%)
CIE-LABlab(55.78, -0.45, -44.66)
CIE-LCHlch(55.78, 44.66, 269.42°)
OKLaboklab(61.75% -0.0497 -0.1269)
OKLCHoklch(61.75% 0.136 248.6)
XYZxyz(22.4174, 23.6898, 65.0065)
Luminance0.2369 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#378AD3 #D38037
analogous
#37D3CE #378AD3 #373CD3
triadic
#378AD3 #D3378A #8AD337
tetradic
#378AD3 #CE37D3 #D38037 #3CD337
square
#378AD3 #CE37D3 #D38037 #3CD337
split-complementary
#378AD3 #D3373C #D3CE37
monochromatic
#1A4B76 #256BA8 #378AD3 #69A7DE #9BC5E9

Accessibility & contrast

On white

3.66
#378AD3 on #FFFFFF
AA ✗AA large ✓AAA ✗

On black

5.74
#378AD3 on #000000
AA ✓AA large ✓AAA ✗

Best text color

#000000 on #378AD3
5.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##378AD3#FFFFFF#000000##000000
##378AD31.003.665.745.74
#FFFFFF3.661.0021.0021.00
#0000005.7421.001.001.00
##0000005.7421.001.001.00

Color blindness preview

Protanopia (red-blind)
#698ED6
Deuteranopia (green-blind)
#527FD2
Tritanopia (blue-blind)
#009BA5
Achromatopsia (no color)
#868686

Design tokens & code

CSS
--color: #378ad3;
/* rgb */ color: rgb(55, 138, 211);
/* oklch */ color: oklch(61.7% 0.136 248.6);
Tailwind
colors: {
  custom: {
    50: '#82abe1',
    500: '#378ad3',
    950: '#000000',
  },
}
SCSS
$custom: #378ad3;
$custom-light: #82abe1;
$custom-dark: #000000;
JSON
{
  "hex": "#378ad3",
  "rgb": {
    "r": 55,
    "g": 138,
    "b": 211
  },
  "hsl": {
    "h": 208.077,
    "s": 63.934,
    "l": 52.157
  },
  "oklch": {
    "l": 0.61749,
    "c": 0.13632,
    "h": 248.6
  },
  "luminance": 0.23692
}

Semantic roles & 50–950 ramp

primary
#378AD3
secondary
#D5B191
accent
#8F41E7
background
#F8FAFD
surface
#F0F4FB
border
#CBCED4
text
#0C1015
muted
#7D7F83

Preview Lab

Preview with #378AD3

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

Preview Lab → · Contrast checker → · Palette generator →

#378AD3 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva