I'm assuming the white lines are placed over the 6 blue rectangles? Select everything. Go to Object > Expand. Select all again. Now click Window > Pathfinder. Click on Merge (2nd row, 3rd along). Now use the white arrow tool to select the areas you want to change colour. Change the colour.
Alternatively just select all then use the Live Paint tool to colour the bits you want.
I'm assuming the white lines are placed over the 6 blue rectangles? Select everything. Go to Object > Expand. Select all again. Now click Window > Pathfinder. Click on Merge (2nd row, 3rd along). Now use the white arrow tool to select the areas you want to change colour. Change the colour.
Alternatively just select all then use the Live Paint tool to colour the bits you want.
Hope that helps.