Online HTML color charts are available on sites such as W3Schools.com, HTML-Color-Codes.info and ColorPicker.com. Sites such as BenjaminMoore.com and Pantone-Colours.com allow users to see the different color options presented by the respective company.
An HTML color chart allows a user to enter in the hexadecimal code or RGB code for a color and see the related code for displaying that color on a website.
BenjaminMoore.com displays all the current colors offered in the company's paint line, with the associated codes for locating the color in a hardware store. Pantone-Colours.com contains information on the official Pantone color scheme, along with related codes and tools for recreating those colors elsewhere.