Leaves have lots of colors in them but all you see is green because they have so much green Chlorophyll. In the winter when the leaves start to die, the Chlorophyll goes away and you can see the other colors that were always in the leaves. These colors are called pigments.
To show you what I mean, we did a little experiment. My dad and sister and I went out and collected 3 different types of leaves.
We put them into 3 different glass bowls.
Mom poured alcohol over the leaves.
We covered them up and let them sit for 30 minutes. We timed it on the microwave timer.
After 30 minutes, my mom put strips of coffee filters in them and we let them sit for over an hour.
The coffee filter paper absorbed all the mixed up color pigment and separated them. This is called chromatography. (Crome-a-tog-ra-fy)
You can see that all sorts of yellows, greens, reds and browns were in the leaves all the time, you just couldn’t see them because of the green Chlorophyl.