Colin's research interests lie widely within the areas of his curatorial responsibility. In particular, he is interested in the education of the artist, exemplified by the teaching practice and influence of John Malchair, the Oxford drawing master in the late 18th century, and John Ruskin a century later.
Among his other interests are topographical representation, especially of Oxford, and the reinterpretation of the past as a means of inventing a radical new language for the present. As the curator of the very extensive Pissarro Family Archive, he has written about Camille Pissarro, the 'father of Impressionism', and his sons.