The Browser-Safe Web Palette by Lynda Weinman is an interesting discussion that reminds us of the nature of the palette and discusses whether we still need to use it.
Here is some further information about web colours including web safe colours from W3 Schools
Have a look at this web site which makes suggestions about what are good design features and what are bad ones. Take a look and see if you agree with them.
You might find some useful tools here at code style.
Please let me know by making a comment if you find any of these useful.