如何在phppresentation幻灯片中使用自定义背景颜色

$slide = $objPHPPresentation->createSlide();

$bgColor = new \PhpOffice\PhpPresentation\Style\Color('FF0000'); // 自定义背景颜色，这里以红色为例
$slide->setBackground($bgColor);

$fillType = \PhpOffice\PhpPresentation\Style\Background::FILL_GRADIENT_LINEAR;
$fillColor1 = new \PhpOffice\PhpPresentation\Style\Color('FF0000'); // 渐变起始颜色
$fillColor2 = new \PhpOffice\PhpPresentation\Style\Color('FFFF00'); // 渐变结束颜色
$slide->setBackgroundFillType($fillType);
$slide->setBackgroundFillColor($fillColor1, $fillColor2);

$bgImage = new \PhpOffice\PhpPresentation\Style\Background\Image();
$bgImage->setPath('path/to/image.jpg'); // 自定义背景图片路径
$slide->setBackgroundImage($bgImage);