Choosing colour
-
Image colour picker - a tool for choosing web colours from an image or screenshot
-
Google colour picker - Searching 'html colour picker' opens up google's own colour picker tool
-
HTML colour codes - Another colour picker that provides some valuable suggestions for colours and themes
HTML & CSS References
-
MDN HTML reference - a reference for HTML tags and attributes
-
MDN CSS reference - a reference for CSS properties and selectors
-
CSS units - There are lots of ways to specify the size of things in CSS and these are the most useful