Reply To: [Solved] How to style all that start with attachment_

[Paulie_D]

This question seems familiar.

[id^="attachment_"] {
  background: #663399;/* or whatever styles*/
}

http://codepen.io/Paulie-D/pen/pvgLda

http://code.tutsplus.com/tutorials/the-30-css-selectors-you-must-memorize–net-16048