In Zen Mode, multiple panes have gray background

[adiospace]

I think it should be completely white.

[adiospace]

Nevermind, fixed with

@import "syntax-variables";

.zen {
   // make the panel background color the same as the current syntax background color
  .item-views {
    background-color:  @syntax-background-color;
  }
}

added to my styles.less.