subject – Blue
- The Transformation (So It Passes) Louis Ducos du Hauron, 1891
- Visualisation of Anna Atkins' Cyanotypes Katie Dean, 2018
- Blue Grotto (Capri Island, Italy) Detroit Publishing Co., ca. 1890
- Corallina elongata Anna Atkins, 1843
- Conferva arcta Anna Atkins, 1843
- Kalymenia Dubyi Anna Atkins, 1843
- Rhodomela lycopodoides Anna Atkins, 1843
- Schizonema comoides Anna Atkins, 1843
- Rhodomenia bifida Anna Atkins, 1843
- Polysiphonia violacea Anna Atkins, 1843
- Himanthalia lorea Anna Atkins, 1843
- Punctaria latifolia Anna Atkins, 1843
- Rhodomenia laciniata Anna Atkins, 1843
- Nitophyllum Bonnemaisoni Anna Atkins, 1843
- Laminaria digitata Anna Atkins, 1843
- Cystoseira granulata Anna Atkins, 1843
- Myriotrichia claviformis Anna Atkins, 1843
- Punctaria Plantaginea Anna Atkins, 1843
- Sargassum plumosum Anna Atkins, 1843
- Asperococcus pusillus Anna Atkins, 1843
- Alaria esculenta Anna Atkins, 1843
- Callithamnion plumula Anna Atkins, 1843
- Polysiphonia fastigiata Anna Atkins, 1843
- Rhodomenia sobolifera Anna Atkins, 1843