In a medium saucepan whisk together the water, heavy cream, half and half, brown sugar, and granulated sugar. Heat over medium heat let the creamer get steamy. Once the sugar is dissolved remove the creamer from the heat.
Once the sugar is dissolved and the creamer is smooth and creamy add in the vanilla extract blueberry emulsion and a pinch of salt. Give a good stir to combine.
Let the creamer cool for 15 minutes and then pour into a jar with a lid and put in the refrigerator for 1-2 weeks. NOTE: Always check your creamer hasn't gone bad before using it. Unlike store bought creamer, homemade coffee creamer will only last 1-2 weeks before going bad.