Cosmetics Formulation Development

The base cream has been produced. will be put in the active extract can be put Or do I have to adjust the temperature of the base cream first?

And can you add different colors to the cream? (Powder color)

Hello, disturbing members. Please inform the composition in the formula and the powder color that is mentioned. What kind of color is it? Because there are different types of colors. and the method of use is different. depending on the solubility for example if dissolved in water To mix in the water. soluble in oil To mix in the oil.