CSS nth child - First TD in each row, alternate color?

Hopefully I can explain what I am trying to do.

In a table. The first TD in each row should alternate color.

Is this possible using nth child?

Ive tried a few things, but cant seem to logically wrap my head around this one.

(trying to expand my horizons)

<tr>
  <td>#0068b3</td>
  <td>#fff</td>
  <td>#fff</td>
</tr>
<tr>
  <td>#aebde1</td>
  <td>#fff</td>
  <td>#fff</td>
</tr>
<tr>
  <td>#0068b3</td>
  <td>#fff</td>
  <td>#fff</td>
</tr>
<tr>
  <td>#aebde1</td>
  <td>#fff</td>
  <td>#fff</td>
</tr>

solution

You could use even/odd to alternate between tr elements and select the first child td element:

EXAMPLE HERE

table tr:nth-child(even) td:first-child {
  background:#0068b3
}
table tr:nth-child(odd) td:first-child {
  background:#aebde1
}