Translucent Shadow Color
Translucent Shadow Color is the term used to describe how shadows will pick up colors of objects that they pass through also known as Transmission.
The amount of light that passes through the material is determined by its opacity value between 0 and 1 and how much light is being cast onto the material.
For example, if the opacity was set to 0, the light transmission for a colored shadow from the material would be none. If the opacity value were set to 1, then it would be fully opaque.