khak·i 
(kăkē, käkē)
(kăkē, käkē)n.
1. A light olive brown to moderate or light yellowish brown.
2.
a. A sturdy cloth of this color.
b. khakis A uniform made of this cloth.
c. khakis Pants made of a twilled cotton fabric of this color or another solid color.
[Urdu khākī, dusty, from Persian, from khāk, dust, from Middle Persian.]
khaki adj.