Add ID or Class to Markdown-element

For CSS purposes you could add an id to the previous element and then use a selector to alter the following element.

Markdown like this:

<div class="special_table"></div>

| First Header  | Second Header |
| ------------- | ------------- |
| Content Cell  | Content Cell  |
| Content Cell  | Content Cell  |

CSS like this:

div.special_table + table tr:nth-child(even) {background: #922}