Add the half & half, sweetened condensed milk, marshmallow extract, vanilla extract, and salt to a blender.
Blend until smooth and fully combined.
Pour the creamer evenly into three separate containers.
Add yellow food coloring to one, pink to another, and lavender to the third.
Secure the lids and shake each container to distribute the color evenly. Add more food coloring until you get the shade you like.
Use the creamer in any drink right away, or store in the fridge for up to 2 weeks or until the best by date on your half & half. Shake before using.