Try changing the colour of the plate you eat from to lose weight a new study says. It helps in cutting the portion size of your diet if you change the colour of your eating plate from white to some brighter shades reports femalefirst.co.uk. A study published in the Journal of Consumer Research reveals that the more significant the contrast between the colour of the food on the plate and the colour of the plate itself the less likely we will overload the plate. The research shows that the actual colours of the food or the plates make no difference;