#3783CC#3783CC

#3783CC is a mid, vivid cyan. Relative luminance 0.214; OKLCH L 59.8% C 0.134 H 250.4°. Best body text is #000000 at 5.28:1 contrast (WCAG AA passes).

Color values

HEX#3783CC
RGBrgb(55, 131, 204)
HSLhsl(209, 59%, 51%)
HSVhsv(209, 73%, 80%)
CMYKcmyk(73%, 35.8%, 0%, 20%)
CIE-LABlab(53.39, 1.19, -44.48)
CIE-LCHlch(53.39, 44.50, 271.54°)
OKLaboklab(59.76% -0.0451 -0.1265)
OKLCHoklch(59.76% 0.134 250.4)
XYZxyz(20.5868, 21.4021, 60.1611)
Luminance0.2140 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#3783CC #CC8037
analogous
#37CCCB #3783CC #3738CC
triadic
#3783CC #CC3783 #83CC37
tetradic
#3783CC #CB37CC #CC8037 #38CC37
square
#3783CC #CB37CC #CC8037 #38CC37
split-complementary
#3783CC #CC3738 #CCCB37
monochromatic
#1C456D #28649E #3783CC #68A1D8 #99BFE5

Accessibility & contrast

On white

3.98
#3783CC on #FFFFFF
AA ✗AA large ✓AAA ✗

On black

5.28
#3783CC on #000000
AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3783CC
5.28:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##3783CC#FFFFFF#000000##000000
##3783CC1.003.985.285.28
#FFFFFF3.981.0021.0021.00
#0000005.2821.001.001.00
##0000005.2821.001.001.00

Color blindness preview

Protanopia (red-blind)
#6287CF
Deuteranopia (green-blind)
#4C79CB
Tritanopia (blue-blind)
#00949E
Achromatopsia (no color)
#808080

Design tokens & code

CSS
--color: #3783cc;
/* rgb */ color: rgb(55, 131, 204);
/* oklch */ color: oklch(59.8% 0.134 250.4);
Tailwind
colors: {
  custom: {
    50: '#81a6dc',
    500: '#3783cc',
    950: '#000000',
  },
}
SCSS
$custom: #3783cc;
$custom-light: #81a6dc;
$custom-dark: #000000;
JSON
{
  "hex": "#3783cc",
  "rgb": {
    "r": 55,
    "g": 131,
    "b": 204
  },
  "hsl": {
    "h": 209.396,
    "s": 59.363,
    "l": 50.784
  },
  "oklch": {
    "l": 0.59757,
    "c": 0.13433,
    "h": 250.4
  },
  "luminance": 0.21404
}

Semantic roles & 50–950 ramp

primary
#3783CC
secondary
#D0AF8E
accent
#9245E3
background
#F8FAFD
surface
#F0F4FB
border
#CBCED4
text
#0C0F15
muted
#7D7F83

Preview Lab

Preview with #3783CC

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

Preview Lab → · Contrast checker → · Palette generator →

#3783CC Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva