I lived in Vietnam for four years before moving to India so it was great to go back to somewhere I was so familiar with and where I still have a lot of friends.
Sometimes, especially when I'm taking pictures somewhere I know well, I'll choose a colour and seek out things to snap that match it. The process is to have a quick scan about and the first photo worthy thing you see, that's the colour. In HCMC it turned out to be purple. Vietnam loves purple in all it's shades and flavours.
When you think of Vietnam or Saigon (aka Ho Chi Minh City) it's likely that rice fields and conical hats come to mind and there are lots and lots of these:

Right there, keeping her Non La or conical hat on - purple. Now you will find lots of ladies in traditional dress but HCMC is a fast developing city. It's a great mix of new and old, foreign and local influences and like most cities it has a fancy shopping street. The start of this area is marked by the Louis Vuitton store on Le Loi Street. Here we have the Four Legged Lady of Le Loi and a purple dominated LV window:
If everyone rides motorbikes then you want yours to stand out from the crowd, if only to find it easier in the parking lots and in HCMC you can do that with style. Anything and everything can be personalised and here are two reconditioned Vespas demonstrating that:
Even the airport has purple seats, some people dress to match...
and some to blend in.