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<html xmlns="http://www.w3.org/1999/xhtml" xmlns:svg="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"> <head> <style> div { width: 50px; height: 100px; background-color: rgba(0,0,255,0.5); } </style> </head> <body> <div/> </body> </html>