<!DOCTYPE html> <html> <head> <style type="text/css"> html img { color: blue; } </style> <script> function boom() { var r = document.createRange(); r.selectNodeContents(document.documentElement); r.cloneContents(); } </script> </head> <body onload="boom();"> <img src="data:image/gif,GIF87a%02%00%02%00%B3%00%00%00%00%00%FF%FF%FF%00%00%00%00%00%00%FF%00%00%00%00%00%00%00%00%00%00%00%00%00%00%00%00%00%00%00%00%00%00%00%00%00%00%00%00%00%00%00%00%00%00%00%2C%00%00%00%00%02%00%02%00%00%04%03%90H%12%00%3B" onload="window.getComputedStyle(this, null).getPropertyValue('color');"> </body> </html>