Toner

Hi:  You indicate that you just got highlights.  If you got them done at a salon, then you should go back and say that you don't like the color and ask the stylist to fix them.  This is your right as you paid for the service.  Do not put anything onto your hair or the salon won't have to fix the highlights. 

It sounds as if the stylist did not leave on the bleach long enough to bring your hair to the pale pastel color you are seeking.  Hair lightens in stages (see Claude's sticky post ont the basics of haircoloring) so that right now your highlights have exposed the underlying colors of the reddish-orange.  No toner that I know of will lighten your highlights to a pale pastel color - I think only more bleaching will accomplish a lighter color.  A toner might tone down the orangish color and then the highlights will appear less orange but will probably also be darker than you are wanting.  Maria