Nickel for your thoughts?

Any thoughts on what type of boarder I should do?  Or what colour I should use?  Should I stick with the colours that are in the blanket?  Or add others? Use the granny square pattern and just continue that way?  Or do some type of fancy boarder? 

I have not done a boarder before... so if there are any tips/ideas out there for granny square blanket boarders I would love to hear them.

So far I have just done two rounds of single crochet in white.

 

When Matt of According To Matt, made his Glorious Granny Greatness!!!,  that was when I knew I wanted to someday be making a granny square blanket.
I hope mine turns out just as great!