EncyCOLORpedia is a great color swatch resource! Great for researching colors, including Paints, Web Safe Colors, HTML Colors, and Named Colors. Each result includes tints, shades, and alternatives colors.
About The Author
Graphic designer since before the Internet. Started with newspaper paste-up; then art director for advertising agency in Reno, NV; and now freelancer designing marketing materials, print-on-demand t-shirt art, websites, and social media graphics.