How can I edit the color of search bar in nautilus gtk3?

Question

i want to change search bar in nautilus to purple but i don't know how this is my first theme still don't know my way around.

here is a example

Answer 1

i found a solution for my problem in

/usr/share/themes/Ambiance-Purple/gtk-3.0/gtk-widgets.css

i change this

/***********
 * infobar *
 ***********/
.info {
    background-image: -gtk-gradient (linear, left top, left bottom,
                                     from (shade (#dbdbdb, 1.04)),
                                     to (shade (#dbdbdb, 0.96)));

to this

/***********
 * infobar *
 ***********/
.info {
    background-image: -gtk-gradient (linear, left top, left bottom,
                                     from (alpha (#dbdbdb, 0.0001)),
                                     to (alpha (#dbdbdb, 0.0001)));

sorry guys but new users aren't allowed to post images you can see them here

Answer 2

follow this tutorial to learn how to make your own GTK3 theme.