They are there but hidden by the green. Also the tree tends to "dump" waste products into the leaves before sealing them off.
Brown gold yellow orange
Leave begin to show their autumn colors, which are green, yellow and orange, due to changes in the weather and the atmospheric conditions of the seasons.
Leaves are actually brown, red, yellow, and all the other colors you see in autumn. Chlorophyll, however, is green, and turns the leaf green with itself. When autumn comes, the chlorophyll decays from the plant, and the plant's real colors are revealed, making autumn a beautiful season in nature.
black and yellow
red, orenge,yellow
brown, orange and yellow
Because it is Autumn and the plant is getting ready to shed it leaves.
The reason leaves change color is the yellow and orange colors are in the leaf 24/7. The plants make food from the suns energy and use the food to make chlorophyll. When the sun isn't shining so much in autumn the plant can't make chlorophyll and the yellow and orange colors are visible.
Carotene gives yellow color to the leaves.
When a banana begins to ripen, the peel begins to change color. It changes from green to yellow to brown. The same occurs with autumn leaves. The green leaves change from green to red and yellow and orange and eventually brown.
Pomegranate trees turn yellow in autumn winter before shedding their leaves.
i think that leaves present the colors green yellow brown red and orange also some leaves are white