gistfile1.txt

<?php
class ServicePage extends Page {

	private static $db = array(
		'DominantColor' => 'Text'
	);

	static $has_one = array(
		'ServiceImage' => 'Image'
	);

	function getCMSFields(){
		$fields = parent::getCMSFields();

		$config = GridFieldConfig_RecordEditor::create();

		$fields->addFieldsToTab('Root.ServiceIcon', array(
			UploadField::create('ServiceImage'),
			TextField::create('DominantColor')
		));

		return $fields;
	}

	function getDominantColor(){
		$colour = $this->getField('DominantColor');

		if($colour){
			return $colour;
		}else{
			$ParentID = $this->ParentID;

			$ParentPage = Page::get()->filter('ID',$ParentID)->First();

			if($ParentID == 0){
				return False;
			}

			if($ParentPage->getDominantColor()){
				return $ParentPage->getDominantColor();
			}
		}
	}

	function ParentServiceImage(){
		$image = $this->ServiceImage();

		if($this->ServiceImage()){
			return $this->ServiceImage();
		}else{
			$ParentID = $this->ParentID;

			$ParentPage = Page::get()->filter('ID',$ParentID)->First();

			if($ParentID == 0){
				return False;
			}

			if($ParentPage->ParentServiceImage()){
				return $ParentPage->ParentServiceImage();
			}
		}
	}
}

class ServicePage_Controller extends Page_Controller {

}