SIghstone variations; Change colours, give bonuses.

RED - Health | HRegen; PURPLE - AP | Mana | MRegen; YELLOW - AD | AtkSp | Armour; BLUE/PINKISH - MR | CD; MoveSpeed? or something ... the stats should be high enough to give supports, optionally junglers some power, yet low enough so that i couldn't be swapped for a usual item from a laner's build. ideas? suggestions for stats, passives? that'd work just like the new jungle items.