Why aren't plants black? 🌿

Just an idea but what if plants have an absorption spectral requirement (distribution) that is relatively continuous across the wavelengths or even normalised to a lesser peak than the light emitted by the sun so that the wavelengths reflected are what is left when the requirement distribution is subtracted; leaving a predominantly green appearance? i.e. Supply and demand are out of balance because plants need similar amounts of all wavelengths🤔