HTML Color Codes website provides free color tools for finding HTML colors for your website. Great tools HTML color chart and HTML color picker will make this simple as a walk in the park.
To quickly start using HTML colors in your website take a look at How to use HTML color codes?. If you wish to learn what this combination of characters in HTML Color Codes actually means than take a look at section HTML Color Codes Theory.
Web safe colors is the list of colors that look the same on all operating systems. And if you have color blindness then check out HTML Color Names to overcome that problem.
Make sure you checkout a list of the best freeware software and online services for web developers.