How to make steamed bread with many colors?

Multicolor steamed bread is propagated on the basis of dyed steamed bread. You can dye the flour with the color of the cell sap of fruits and vegetables, thus forming multi-color flour, so that you can make multi-color steamed bread. For example, steam pumpkins and mash them. Add flour and pumpkin puree to the bowl. Knead into a smooth pumpkin dough. Spinach is squeezed into spinach juice by adding water. Sift the spinach juice and strain out the green juice. Squeeze purple cabbage with water to make purple cabbage juice. Add baking powder to flour, add spinach juice to flour, and knead while adding. Knead into a smooth green dough. Add baking powder to the flour, add purple cabbage juice to the flour, and add it while kneading. Knead into purple dough. You can make steamed bread in various colors.