Question

it's dark but it's made up of light.

WHAT AM I
5 LETTERS

Answer 1

The answer is shadow.

But it has 6 letters

Answer 2

Shadow is the five letter word which is dark and is made up of light. Shadows will never be created if there is no light. Hence light is necessary for the creation of a shadow.

Shadow, however, is dark in its character. This dark character follows up wherever we go. It also changes its shape based on light.

As a result, I have come to a conclusion that shadow is that five letter world made up of illumination but with an inherent dark as its basic color.