All pages should contain a colour theme except the home page. This should mean that you shouldn't have to worry about
the styling of most of the links, buttons and various other elements on the page.

You can achieve this by putting a class on the the most logical, highest-level element of the page (either `body` or `main`).

```html
<main class="red-theme">
...
```

By default the theme is charcoal.

## Section theming

It's also possible to theme at a section level. This should prevent having to style individual elements and allow for inheritance 
to do all the work!

```html
<div class="section section--red">
...
```