How do you make 4lts of white into a charcoal colour?

To create a charcoal color from 4 liters of white paint, you'll need to gradually mix in black paint. Start by adding small amounts of black paint to the white, stirring thoroughly after each addition until you achieve the desired shade of charcoal. It's important to add the black paint slowly, as it's much darker and can quickly overpower the white. Adjust the mixture until you reach the perfect charcoal hue.