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<!DOCTYPE html> <html> <body> <h2 style="background-color:rgb(0,0,0);color:white"> Background-color set by using rgb(0,0,0) </h2> <h2 style="background-color:rgb(128,128,128);color:white"> Background-color set by using rgb(128,128,128) </h2> <h2 style="background-color:rgb(255,255,255);"> Background-color set by using rgb(255,255,255) </h2> </body> </html>