This document discusses early color photography techniques and provides examples of some of the earliest color photographs taken in the Russian Empire in the early 1900s. It explains that three black and white photos were taken through red, green, and blue filters and combined to produce a full color image. Many of the color photos were taken by Sergei Mikhailovich Prokudin-Gorskii between 1905-1915 and include portraits, landscapes, and scenes of daily life across the Russian Empire. The Library of Congress has since scanned and color corrected some of Prokudin-Gorskii's original glass plate negatives.