What would happen if I dyed my strawberry blonde hair the same shade as cheryl cole?

I really wanna dye my hair as people call me ginger (ALLOT!) I have strawberry blonde hair and I have never dyed my hair before and I saw cheryl with reddish hair and I loved it sooo what would happen if i dyed my hair the same colour or mahogany or burgundy?? PLEASE HELP!! Thankks : D xx