adjacent: no visible global function definition for ‘col2rgb’
anagrams: no visible global function definition for ‘rgb2hsv’
anagrams: no visible global function definition for ‘col2rgb’
anagrams: no visible global function definition for ‘hsv’
col2HSV: no visible global function definition for ‘col2rgb’
col2HSV: no visible global function definition for ‘rgb2hsv’
col2HSV: no visible global function definition for ‘hsv’
complementary: no visible global function definition for ‘col2rgb’
pals: no visible global function definition for ‘par’
pals: no visible global function definition for ‘rect’
pals: no visible global function definition for ‘col2rgb’
pals: no visible global function definition for ‘mtext’
pizza: no visible global function definition for ‘col2rgb’
pizza: no visible global function definition for ‘par’
pizza: no visible global function definition for ‘plot.new’
pizza: no visible global function definition for ‘dev.hold’
pizza: no visible global function definition for ‘dev.flush’
pizza: no visible global function definition for ‘plot.window’
pizza: no visible global function definition for ‘polygon’
pizza: no visible global function definition for ‘lines’
pizza: no visible global function definition for ‘text’
sequential: no visible global function definition for ‘rgb2hsv’
sequential: no visible global function definition for ‘col2rgb’
sequential: no visible global function definition for ‘hsv’
sequential: no visible global function definition for ‘rect’
sequential: no visible global function definition for ‘mtext’
sequential: no visible global function definition for ‘title’
setColors: no visible global function definition for ‘col2rgb’
setColors: no visible global function definition for ‘rgb2hsv’
setColors: no visible global function definition for ‘hsv’
splitComp: no visible global function definition for ‘col2rgb’
square: no visible global function definition for ‘col2rgb’
tetradic: no visible global function definition for ‘col2rgb’
triadic: no visible global function definition for ‘col2rgb’
wheel: no visible global function definition for ‘col2rgb’
wheel: no visible global function definition for ‘par’
wheel: no visible global function definition for ‘plot.new’
wheel: no visible global function definition for ‘dev.hold’
wheel: no visible global function definition for ‘dev.flush’
wheel: no visible global function definition for ‘plot.window’
wheel: no visible global function definition for ‘polygon’
wheel: no visible global function definition for ‘lines’
wheel: no visible global function definition for ‘text’
wheel: no visible global function definition for ‘title’
Undefined global functions or variables:
  col2rgb dev.flush dev.hold hsv lines mtext par plot.new plot.window
  polygon rect rgb2hsv text title
Consider adding
  importFrom("grDevices", "col2rgb", "dev.flush", "dev.hold", "hsv",
             "rgb2hsv")
  importFrom("graphics", "lines", "mtext", "par", "plot.new",
             "plot.window", "polygon", "rect", "text", "title")
to your NAMESPACE file.