If it's the regular terracotta line, then 00, 02, and 04 are for the pink toned. 01, 03, 04, 05, and 07 are for yellow/olive tones, and 08 is red toned. I agree with Vineetha's recommendation of 05 for you. This link may be helpful because it has swatches for all of the shades:
https://fleurissante.wordpress.com/2011/05/18/guerlain-terracotta-bronzing-powder-swatches/ However, I find the regular terracotta very pigmented compared to the 4 seasons and light (mosaic ones). I'm 00 and 02 from the regular line, but 02 is a little too intense for my liking.