Louis Arthur Ducos du Hauron (8 December 1837 – 31 August 1920) was a French pioneer of color photography.

After writing an unpublished paper setting forth his basic concepts in 1862, he worked on developing practical processes for color photography on the three-color principle, using both additive and subtractive methods.

The discovery of dye sensitization by Hermann Wilhelm Vogel in 1873 greatly facilitated the initial three-color analysis on which all of Ducos de Hauron's methods depended.

[4] The most widely reproduced of his surviving color photographs is the View of Agen, an 1877 image of a landscape in southern France, printed by the subtractive assembly method he pioneered.

Although others had earlier applied the same principle to drawings or used it to project images onto a screen, he was the first to reproduce stereoscopic photographs in the convenient form of anaglyph prints on paper.