  Disordered dielectrics with structural correlations on length scales
comparable to visible light wavelengths exhibit complex optical properties.
Such materials exist in nature, leading to beautiful structural non-iridescent
color, and they are also increasingly used as building blocks for optical
materials and coatings. In this article, we study the single-scattering
properties of micron-sized, disordered colloidal assemblies. The aggregates act
as structurally colored supraparticles or as building blocks for macroscopic
photonic glasses. We present experimental data for the differential scattering
and transport cross-section. We show how we can adapt existing macroscopic
models to describe the scattering from small colloidal assemblies outside the
weak-scattering limit and entering the Lorentz-Mie regime.
