def setup
  # Grayscale integer value
  background(51)
end

def setup
  # R, G & B integer values
  background(255, 204, 0)
end

def setup
  # H, S & B integer values
  colorMode(HSB)
  background(255, 204, 100)
end

def setup
  # Named SVG/CSS color string
  background('red')
end

def setup
  # three-digit hexadecimal RGB notation
  background('#fae')
end

def setup
  # six-digit hexadecimal RGB notation
  background('#222222');
end

def setup
  # integer RGB notation
  background('rgb(0, 255, 0)')
end

def setup
  # integer RGBA notation
  background('rgba(0, 255, 0, 0.25)')
end

def setup
  # percentage RGB notation
  background('rgb(100%, 0%, 10%)')
end

def setup
  # percentage RGBA notation
  background('rgba(100%, 0%, 100%, 0.5)')
end

def setup
  # p5 Color object
  background(color(0, 0, 255))
end