#3778CC#3778CC

#3778CC is a mid, vivid cyan. Relative luminance 0.186; OKLCH L 57.3% C 0.146 H 256.1°. Best body text is #000000 at 4.72:1 contrast (WCAG AA passes).

Color values

HEX#3778CC
RGBrgb(55, 120, 204)
HSLhsl(214, 59%, 51%)
HSVhsv(214, 73%, 80%)
CMYKcmyk(73%, 41.2%, 0%, 20%)
CIE-LABlab(50.22, 7.88, -49.52)
CIE-LCHlch(50.22, 50.14, 279.05°)
OKLaboklab(57.28% -0.0351 -0.1415)
OKLCHoklch(57.28% 0.146 256.1)
XYZxyz(19.1871, 18.6027, 59.6945)
Luminance0.1860 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#3778CC #CC8B37
analogous
#37C2CC #3778CC #4037CC
triadic
#3778CC #CC3778 #78CC37
tetradic
#3778CC #CC37C2 #CC8B37 #37CC40
square
#3778CC #CC37C2 #CC8B37 #37CC40
split-complementary
#3778CC #CC4037 #C2CC37
monochromatic
#1C3F6D #285B9E #3778CC #6899D8 #99BAE5

Accessibility & contrast

On white

4.45
#3778CC on #FFFFFF
AA ✗AA large ✓AAA ✗

On black

4.72
#3778CC on #000000
AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3778CC
4.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##3778CC#FFFFFF#000000##000000
##3778CC1.004.454.724.72
#FFFFFF4.451.0021.0021.00
#0000004.7221.001.001.00
##0000004.7221.001.001.00

Color blindness preview

Protanopia (red-blind)
#507FCF
Deuteranopia (green-blind)
#3771CA
Tritanopia (blue-blind)
#008C98
Achromatopsia (no color)
#777777

Design tokens & code

CSS
--color: #3778cc;
/* rgb */ color: rgb(55, 120, 204);
/* oklch */ color: oklch(57.3% 0.146 256.1);
Tailwind
colors: {
  custom: {
    50: '#819edc',
    500: '#3778cc',
    950: '#000000',
  },
}
SCSS
$custom: #3778cc;
$custom-light: #819edc;
$custom-dark: #000000;
JSON
{
  "hex": "#3778cc",
  "rgb": {
    "r": 55,
    "g": 120,
    "b": 204
  },
  "hsl": {
    "h": 213.826,
    "s": 59.363,
    "l": 50.784
  },
  "oklch": {
    "l": 0.57284,
    "c": 0.14574,
    "h": 256.1
  },
  "luminance": 0.18605
}

Semantic roles & 50–950 ramp

primary
#3778CC
secondary
#D0B48E
accent
#9E45E3
background
#F8F9FD
surface
#F0F2FB
border
#CBCCD4
text
#0C0E15
muted
#7D7E83

Preview Lab

Preview with #3778CC

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

Preview Lab → · Contrast checker → · Palette generator →

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