White, Blue, Kinda purplish exhaust

[polarisrider4life]

What does it mean when a diesel truck starts up and you get white smoke and or blue-ish purple smoke from the exhaust....i saw a bunch of people fighting on youtube comments about what it means and i was just curious because i don't know what it means? lol One guy said it's from reving it high when the engine is bone cold????

[jbeasts10]

Mine has a similar color while cold.Clears once it is warm though.

[GreenF350]

If it's cold, white is usually glow plugs not working right (or just extremely cold).
-Aaron

[TowBoss]

I have a glow-plug out on my truck....I have some white smoke when I start it on cold days. I plan on fixing this problem next week. Exhaust smoke that is white, can be caused from a variety of reasons.

[Big Calo]

White usually from cold start. The blueish color is from oil.