Dreams

Yesterday night I dreamt about missing a train. I am supposed to catch a train at 1:00PM. I realize that at 12:30. Haven't even packed my stuff. I dump stuff into my rucksack. Get on the road. Wave frantically at autos. Not even a single auto seems to be free. Finally get into one after much frantic waving. Make it to the railway station just in time. About to board the train, I realize tickets are not in the wallet. I forgot them back home. Bang. I wake up. Smile. Back to sleep, feeling happy that there is no train to catch.

I can never understand dreams. Have read somewhere that dreams are always in black in white. No colors in dreams except shades of grey. Is it true?