RColorBrewer Shades of Blue by John Wingate February 4, 2018 written by John Wingate February 4, 2018 0FacebookTwitterPinterestLinkedinTumblrRedditStumbleuponWhatsappEmailLeave a Comment Cancel ReplySave my name, email, and website in this browser for the next time I comment.Please enter an answer in digits:nineteen − 5 =