Smei-permanent color question...please help

Would a semi-permanent color like Natural Instincts (or a similar brand) be good to add gold tones to my medium neutral brown hair? I don't want to lighten the hair, but I just want to add some warm tones to it. I want to start out semi-permanent because if I don't like it it will wash out eventually. ( I will do a strand test first of course.)If I get a semi-perm. color in a medium golden brown, will the warm tones be visible in my hair?