Question

How does one test for fats and oil? And color
does it give off

Answer 1

Sometimes gives off a certain odor

Answer 2

Answer:

paper test

actually this test no need of color observation

Explanation:

take a paper put any fatty substance and cover it with another paper and start rubbing

you can see that the paper is becoming a bit opaque

and this is because of oil or fatty substance in that food item

hope it helped