First off What is Ombré?
This gradual merging of shades (or color bleeding) is both elegant and feminine. Unlike the hippie tie-dye, there is a much smoother transition between colors. The color bleeding can be used to create a dramatic look or a soft one, depending on the graduated strength of the dye effect.
Basically, The contrast between the lightly colored hair ends and the dark roots is no longer a sign of unkempt hair color and perfection is no longer a necessary attribute.
*below is a step by step how to create the ombre look by your self at home video
and here is a video on how to achieve the ombre look by lightening only the ends