Misc Tips and Troubleshooting
Remember that using this feature will only affect how ebooks appear in calibre's viewer. It will not change the CSS within your ebook. Keep this in mind if you use the calibre viewer to test the results of tweaks you make to your ebook file.
For a simple tutorial about CSS styles and how to create them,
check out the CSS Tutorial
For handy color codes - Hex, RGB, Names:
Color Picker: http://www.w3schools.com/tags/ref_colorpicker.asp
Basic colors: http://www.w3schools.com/css/css_colors.asp
Named colors: http://www.w3schools.com/css/css_colorsfull.asp
Run Quick Tests: http://www.w3schools.com/Css/tryit.a...trycss_default
Pseudo selectors, e.g., a:link, p:first-line, etc. are not supported
If the book you are reading already defines CSS styles that override your definitions, try adding "!important".
color: red !important;