You can positively isolate your desired P style:
<p class="hasStyle"></p <p></p>
Or you can override the ones you want to keep unchanged:
<style> p { background-color:#000000; width:550px; } .noStyle { background-color: none; width: none ; } </style> <p>has a style</p> <p class="noStyle"></p>
The latter is more difficult to maintain.
source share