[Jolten]

The CSS for the reply area is actually within the templates. Don't ask me why. The CSS that gets applied to the reply box is located in the Editor Templates > editor_clientscript template. The vBulletin_editor id is what actually controls the background of the reply box.

<style type="text/css">
<!--
#vBulletin_editor {
	background: {$istyles[pi_button_normal][0]};
	padding: $stylevar[cellpadding]px;
}
.imagebutton {
	background: {$istyles[pi_button_normal][0]};
	color: {$istyles[pi_button_normal][1]};
	padding: {$istyles[pi_button_normal][2]};
	border: {$istyles[pi_button_normal][3]};
}
.ocolor, .ofont, .osize, .osmilie, .osyscolor, .smilietitle {
	background: {$istyles[pi_menu_normal][0]};
	color: {$istyles[pi_menu_normal][1]};
	border: {$istyles[pi_menu_normal][3]};
}
.popup_pickbutton {
	border: {$istyles[pi_menu_normal][3]};
}
.popup_feedback {
	background: {$istyles[pi_menu_normal][0]};
	color: {$istyles[pi_menu_normal][1]};
	border-right: {$istyles[pi_menu_normal][3]};
}
.popupwindow {
	background: {$istyles[pi_menu_normal][0]};
}
#fontOut, #sizeOut, .popup_feedback div {
	background: {$istyles[pi_menu_normal][0]};
	color: {$istyles[pi_menu_normal][1]};
}
.alt_pickbutton {
	border-left: 1px solid {$istyles[pi_button_normal][0]};
}
-->
</style>