^^&&^^

Edit File: view-thumbnail.css

/* view-thumbnail.css */
/* Wrapper for thumbnail view */
.elfinder .elfinder-cwd-view-icons {
}

/* File wrapper */
.elfinder .elfinder-cwd-view-icons .elfinder-cwd-file {
  border: 1px solid transparent;
  border-radius: 0;
}

/* Hovered file */
.elfinder .elfinder-cwd-view-icons .elfinder-cwd-file.ui-state-hover {
  background: #e5f3ff;
}

/* Selected file */
.elfinder .elfinder-cwd-view-icons .elfinder-cwd-file.ui-selected {
  background: #cce8ff;
  border: 1px solid #99d1ff;
}

/* File icon */
.elfinder .elfinder-cwd-view-icons .elfinder-cwd-file .elfinder-cwd-icon {
}

.elfinder .elfinder-cwd-view-icons .elfinder-cwd-file .elfinder-cwd-icon-directory,
.elfinder .elfinder-dialog .elfinder-cwd-icon-directory {
  background-color: transparent;
  background-image: url('../images/48px/directory.svg') !important;
  background-position: center center;
  height: 48px;
  width: 48px;
  background-size:48px;
}
.elfinder .elfinder-cwd-view-icons .elfinder-cwd-file .elfinder-cwd-icon.elfinder-cwd-icon-pdf{
	   background-image: url('../images/48px/pdf.svg');
	  background-size:36px;
	  background-position: center center;
  }
  .elfinder .elfinder-cwd-view-icons .elfinder-cwd-file .elfinder-cwd-icon.elfinder-cwd-icon-x-php{
	   background-image: url('../images/48px/php_file.svg');
	  background-size:44px;
	  background-position: center center;
  }
  .elfinder .elfinder-cwd-view-icons .elfinder-cwd-file .elfinder-cwd-icon.elfinder-cwd-icon-html{
	  background-image: url('../images/48px/html_file.svg');
	  background-size:40px;
	  background-position: center center;
  }
  .elfinder .elfinder-cwd-view-icons .elfinder-cwd-file .elfinder-cwd-icon.elfinder-cwd-icon-plain{
	  background-image: url('../images/48px/text_file.svg');
	  background-size:40px;
	  background-position: center center;
  }
  .elfinder .elfinder-cwd-view-icons .elfinder-cwd-file .elfinder-cwd-icon.elfinder-cwd-icon-x-pascal{
	  background-image: url('../images/48px/text_file.svg');
	  background-size:40px;
	  background-position: center center;
  }
/* File name */
.elfinder .elfinder-cwd-view-icons .elfinder-cwd-file .elfinder-cwd-filename {
}
.elfinder .ui-state-active .ui-button-text {
	color: #fff;
}