I don't know about you, but as I'm writing a blog post, I often find myself remembering a link I read earlier that is related to the subject as I'm typing. So, I usually type out the text of the link, and try to remember to add the link in later. Unfortunately, we all forget things like this too often.
When we think of CSS and web design, we generally think in two dimensions. After all, the screens we use to view websites display the page as a two-dimensional image. Two of the most common CSS properties, width and height, match that.
No web developer can go a day without encountering any method of representing colour on the web. There are many ways of representing colour, some have advantages and disadvantages over others, but of course, the vastly popular and most well-known option is hex colour codes.