#3778CB#3778CB

#3778CB is a mid, vivid cyan. Relative luminance 0.186; OKLCH L 57.2% C 0.144 H 255.9°. Best body text is #000000 at 4.71:1 contrast (WCAG AA passes).

Color values

HEX#3778CB
RGBrgb(55, 120, 203)
HSLhsl(214, 59%, 51%)
HSVhsv(214, 73%, 80%)
CMYKcmyk(72.9%, 40.9%, 0%, 20.4%)
CIE-LABlab(50.16, 7.52, -49.04)
CIE-LCHlch(50.16, 49.61, 278.71°)
OKLaboklab(57.22% -0.0353 -0.14)
OKLCHoklch(57.22% 0.144 255.9)
XYZxyz(19.0675, 18.5549, 59.0649)
Luminance0.1856 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#3778CB #CB8A37
analogous
#37C2CB #3778CB #4037CB
triadic
#3778CB #CB3778 #78CB37
tetradic
#3778CB #CB37C2 #CB8A37 #37CB40
square
#3778CB #CB37C2 #CB8A37 #37CB40
split-complementary
#3778CB #CB4037 #C2CB37
monochromatic
#1C3F6C #295B9C #3778CB #6899D8 #98BAE4

Accessibility & contrast

On white

4.46
#3778CB on #FFFFFF
AA ✗AA large ✓AAA ✗

On black

4.71
#3778CB on #000000
AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3778CB
4.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##3778CB#FFFFFF#000000##000000
##3778CB1.004.464.714.71
#FFFFFF4.461.0021.0021.00
#0000004.7121.001.001.00
##0000004.7121.001.001.00

Color blindness preview

Protanopia (red-blind)
#507FCE
Deuteranopia (green-blind)
#3871C9
Tritanopia (blue-blind)
#008B97
Achromatopsia (no color)
#777777

Design tokens & code

CSS
--color: #3778cb;
/* rgb */ color: rgb(55, 120, 203);
/* oklch */ color: oklch(57.2% 0.144 255.9);
Tailwind
colors: {
  custom: {
    50: '#809edb',
    500: '#3778cb',
    950: '#000000',
  },
}
SCSS
$custom: #3778cb;
$custom-light: #809edb;
$custom-dark: #000000;
JSON
{
  "hex": "#3778cb",
  "rgb": {
    "r": 55,
    "g": 120,
    "b": 203
  },
  "hsl": {
    "h": 213.649,
    "s": 58.73,
    "l": 50.588
  },
  "oklch": {
    "l": 0.57222,
    "c": 0.14443,
    "h": 255.9
  },
  "luminance": 0.18557
}

Semantic roles & 50–950 ramp

primary
#3778CB
secondary
#D0B38E
accent
#9D46E2
background
#F8F9FD
surface
#F0F2FB
border
#CBCCD4
text
#0C0E15
muted
#7D7E83

Preview Lab

Preview with #3778CB

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

Preview Lab → · Contrast checker → · Palette generator →

#3778CB Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva