Decorate your table with blue and white colors. You can use a white tablecloth and decorate the table with little dreidels (four-sided tops) and blue dishes. You can find many Hanukkah decorations available in many crafts stores that will help you to decorate your table.
You can create great decorations made with craft paper (ask the kids to help) or paper napkins.
Another idea is to paint fresh leaves and pinecones in white and blue and disperse them on you tablecloth (make sure they are dry), they make beautiful decorations.
You can also use blue and white candles and use wine goblets as candleholders.
At Hanukkah you can find chocolate coins available in little packages. You can use them as decoration for napkin holders.