给大家看一个文件的函数，/lib/Varien/Image/Adapter/Abstract.php

public function backgroundColor($value = null)
    {
        if (null !== $value) {
            if ((!is_array($value)) || (3 !== count($value))) {
                return;
            }
            foreach ($value as $color) {
                if ((!is_integer($color)) || ($color < 0) || ($color > 255)) {
                    return;
                }
            }
        }
        $this->_backgroundColor = $value;
        return $this->_backgroundColor;
    }

<img src="/<?php echo $this->helper('catalog/image')->init($_product, 'small_image')->resize(160, 190)->backgroundColor(248,248,248); ?>