"Journey to the Microcosmos: The Colors of the Microcosmos" explores how microbes appear under a microscope and explains the science behind their vivid colors. Using examples such as amoebas, cyanobacteria, diatoms, Euglena, and Haematococcus, the video connects microscopy, microbiology, physics, and chemistry through concepts including visible light, wavelengths, reflection, absorption, chlorophyll, carotenoids, phycocyanin, photosynthesis, and endosymbiosis. It shows how microbial pigments support survival by capturing light energy or protecting cells from ultraviolet radiation, while also highlighting scientific applications such as fluorescent imaging and pigment research. This content supports life science and physical science curricula by linking cell-scale observation to energy transfer, evolution, and the properties of light. Part of the "Journey to the Microcosmos" series.