added feature to generate contrasting colors
added feature to generate contrasting colors

ahmadruhaifi/randomColor,manuelWeb/randomColor,2947721120/Random-Color,nathanielcollum/randomColor,daviesgeek/randomColor,haolee1990/randomColor,guillermoandrae/randomColor,abhishekbhalani/randomColor,ganlanyuan/randomColor,nathanielcollum/randomColor,wangjun/randomColor,davidmerfield/randomColor,rstr74/randomColor,2947721120/Random-Color,haolee1990/randomColor,mcanthony/randomColor,wangjun/randomColor,guillermoandrae/randomColor,rstr74/randomColor,ahmadruhaifi/randomColor,tricialing/randomColor,grandsong/randomColor,abhishekbhalani/randomColor,ganlanyuan/randomColor,daviesgeek/randomColor,grandsong/randomColor,mcanthony/randomColor,tricialing/randomColor,manuelWeb/randomColor