HTML Color Codes is a superb resource for all things colour and more. Colours can be browsed via the colour picker, with palettes generated based on your choice. The palette type can also be adjusted into various different types, exporting is easy once you’ve got a palette you want.
There are various colour charts and lists of CSS colour names that are great for reference, as well as tutorial and resources sections that have some excellent content.
Visit: HTML Color Codes.