Chlorophyll's role is to absorb light for photosynthesis. There are two main types of chlorophyll: A and B. Chlorophyll A's central role is as an electron donor in the electron transport chain. Chlorophyll B's role is to give organisms the ability to absorb higher frequency blue light for use in photosynthesis.
So, what is the true color of chlorophylls? In the case of chlorophyll a the maximal absorption in the red region is at 642 nm and in the blue region at 372 nm; for chlorophyll b the values are 626 nm and 392 nm, respectively. This means that the environment red-shifts the absorption spectra of chlorophyll in plant cells or, in other words, chlorophyll pigments are bluer than we think
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