Three friends, Anil, Bimal and Chetan, each wear a different coloured garment (red, blue or green) and have a different surname (Roy, Sen or Das). The following facts are true:

1. Chetan wears green.

2. Anil does not wear red.

3. Anil's surname is Roy.

4. Bimal's surname is not Sen.

5. The person with surname Das wears red.

What colour does the person with surname Das wear?