Now what would be more fun is crossing a BLR Roo with the chocolate hen. The Khakis resulting from that will eventually produce Chocolate laced Wyandottes but you will have to breed a lot to get the right genotype of the Khakis for that.@Avlana
If you do have purebred of both parents, according to the chicken calculator, you will get half blue and half black. The cockerels will be split for chocolate
If you continue with Blue Split Roo and cross it with the mother, you will get some khaki, along with black, blue and chocolate.
I don't know what your objectives are but you will only have some khakis as a new color from the two.
Cross the khakis together and you will get some splashes along with chocolate and more khakis