Intangible perception of reflecting light,
Electromagnetic radiation stimulating
Mammalian photoreceptors, six million
Cone cells densely packed, in a point three
Millimetres area known, as the fovea centralis
Residing at the core, of colour-grasping retinas.

Red, green and blue, bases of interpretation,
As all others can be matched with a combination
Of the three, for trichromats to see, distinguish
Energy of wavelengths to believe in deception,
Think that colours do exist, a gift of pigments
Inherited from early vertebrates, while fish

And birds may see Ultraviolets, as they are given
An extra one. Classification in categories,
Yellow, orange, purple, indigo and many more,
Associated with objects through wavelengths
Of light reflecting from them depending on physical
Properties deciding, whether to reflect specularly,

Scatter or absorb. Objects thus have the colour
Of the light leaving their surface, while rainbows
Continue to enchant exquisitely, the eye of the
Beholder struggling, to understand the physics
Of such bewildering apparition. Waiting for evolution
To give it a few pigments more, for it to see beyond.