In most plants, the predominant type of chlorophyll reflects green light - this is why most plants appear to be green to our eyes. However, there are other types of chlorophyll that reflect red, orange and yellow light - you see these in leaves that are shed in the fall from deciduous trees in temperate forests.
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The chlorophyll
Chlorophyll reflect green color. That is why they appear in green
Chloroplasts and the chlorophyll
The remaining colors of light that are not absorbed by trees are typically reflected or scattered. This is why we perceive leaves as green, as they reflect green light. This process also helps in photosynthesis as certain wavelengths of light are absorbed by the chlorophyll in the leaves.
In the fall, leaves stop producing chlorophyll, the pigment that gives them their green color. As the chlorophyll breaks down, other pigments such as carotenoids (yellow and orange) and anthocyanins (red and purple) become more prominent, resulting in the vibrant colors we see in autumn leaves.