Question on dynamic components

I downloaded several dynamic component windows from the 3D warehouse. I selected one of several colors available but all of the colors appear under in model in the materials tab. I am unable to purge them and was wondering if they needlessly bloat the model.

It is in the nature of things. All materials in the model appear in the In Model materials and if they are in use they cannot be purged.

All the colours in the components are shown in the Material Window. Even if a component is not used in the model, it is still retained in the Components and its colours are also retained.

If you purge this component, then, its colours can be purged.

A lot of Dynamic Components use nested color ‘swatch’ components (or Groups) to have the textures embedded, otherwise, the formulas that refer to certain materialnames won’t work.
They are usually hidden or very tiny.