Hair dyeing, what color would this be?

Ive dyed my hair allot through out the years and have always made my hair darker. My hair is naturally a shade like dirty blonde more towards brown then blonde. I have my hair dyed more of a medium dark brown to almost dark brown with a redness to it when the light hits it. I would like to make my hair a shade of satin blonde, or at least make it a light brown something closer to my natural color. I know this involves bleaching. So my question is what all would i need done to my hair if i did it professionally or if i took a box of blonde hair dye from the store what shade or color would it be. Please and thank you to all.