Invert top n colours in an image file.
negative.RdColours are extracted from an image via URL and reversed, (e.g. red becomes cyan, green becomes magenta, yellow becomes blue) then stored in a table as HEX codes and RGB values.
negative.RdColours are extracted from an image via URL and reversed, (e.g. red becomes cyan, green becomes magenta, yellow becomes blue) then stored in a table as HEX codes and RGB values.