#3779CC#3779CC

#3779CC is a mid, vivid cyan. Relative luminance 0.188; OKLCH L 57.5% C 0.145 H 255.6°. Best body text is #000000 at 4.77:1 contrast (WCAG AA passes).

Color values

HEX#3779CC
RGBrgb(55, 121, 204)
HSLhsl(213, 59%, 51%)
HSVhsv(213, 73%, 80%)
CMYKcmyk(73%, 40.7%, 0%, 20%)
CIE-LABlab(50.50, 7.27, -49.06)
CIE-LCHlch(50.50, 49.60, 278.42°)
OKLaboklab(57.51% -0.036 -0.1401)
OKLCHoklch(57.51% 0.145 255.6)
XYZxyz(19.3080, 18.8445, 59.7348)
Luminance0.1885 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#3779CC #CC8A37
analogous
#37C3CC #3779CC #3F37CC
triadic
#3779CC #CC3779 #79CC37
tetradic
#3779CC #CC37C3 #CC8A37 #37CC3F
square
#3779CC #CC37C3 #CC8A37 #37CC3F
split-complementary
#3779CC #CC3F37 #C3CC37
monochromatic
#1C406D #285C9E #3779CC #689AD8 #99BAE5

Accessibility & contrast

On white

4.40
#3779CC on #FFFFFF
AA ✗AA large ✓AAA ✗

On black

4.77
#3779CC on #000000
AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3779CC
4.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##3779CC#FFFFFF#000000##000000
##3779CC1.004.404.774.77
#FFFFFF4.401.0021.0021.00
#0000004.7721.001.001.00
##0000004.7721.001.001.00

Color blindness preview

Protanopia (red-blind)
#5280CF
Deuteranopia (green-blind)
#3972CA
Tritanopia (blue-blind)
#008C98
Achromatopsia (no color)
#787878

Design tokens & code

CSS
--color: #3779cc;
/* rgb */ color: rgb(55, 121, 204);
/* oklch */ color: oklch(57.5% 0.145 255.6);
Tailwind
colors: {
  custom: {
    50: '#819fdc',
    500: '#3779cc',
    950: '#000000',
  },
}
SCSS
$custom: #3779cc;
$custom-light: #819fdc;
$custom-dark: #000000;
JSON
{
  "hex": "#3779cc",
  "rgb": {
    "r": 55,
    "g": 121,
    "b": 204
  },
  "hsl": {
    "h": 213.423,
    "s": 59.363,
    "l": 50.784
  },
  "oklch": {
    "l": 0.57506,
    "c": 0.14465,
    "h": 255.6
  },
  "luminance": 0.18847
}

Semantic roles & 50–950 ramp

primary
#3779CC
secondary
#D0B38E
accent
#9D45E3
background
#F8F9FD
surface
#F0F2FB
border
#CBCCD4
text
#0C0E15
muted
#7D7E83

Preview Lab

Preview with #3779CC

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

Preview Lab → · Contrast checker → · Palette generator →

#3779CC Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva