[zerostar]

  This is always a question mark in my mind
Besides co2(s) ,which chemicals can produce the smoke in colour?
I appreciate you if you can help me

[Arkcon]

Colored smoke is a pretty difficult pyrotechnic effect to pull off.  They basically rely on finely dispered dyes, and a fuel that's hot enough to disperse the dye particles, and not burn them.  There isn't really a simple chemical way to pull that effect off.