xxxxxxxxxx<html lang="en"><head><meta charset="utf-8"><title>Example of Defining Fallback Color for RGBA</title><style> p { padding: 20px; /* Fallback for web browsers that doesn't support RGBA */ background:rgb(0, 0, 0); /* RGBa with 0.5 opacity */ background:rgba(0, 0, 0, 0.5); }</style></head><body> <p><strong>Warning:</strong> Internet Explorer 8 and earlier version doesn't support the RGBA colors.</p></body></html>