Here are ALL of the commands though:
Helmet: /give @p leather_helmet 1 0 {display:{color:16711680}}
ChestPlate: /give @p leather_chestplate 1 0 {display:{color:16711680}}
Leggings: /give @p leather_leggings 1 0 {display:{color:16711680}}
Boots: /give @p leather_boots 1 0 {display:{color:16711680}}