A photographic printing process that yields monochrome blue images on paper or cloth, developed by Sir John Herschel and still used for art, botanical studies, and blueprints.
Key traits
- Textured
- Nostalgic
- High contrast
Palette
- #1b3a6b
- #3f6fa8
- #e8e4d8
Origins
Sir John Herschel discovered and named the cyanotype process, publishing his investigation of light on iron compounds in 1842. Building on earlier work with ferric oxalate and potassium ferricyanide, he combined ammonium iron citrate with potassium ferricyanide to coat paper. He did not patent it, and the process spread quickly through manuals and practitioners in Europe and beyond.
Visual language
Cyanotype images are monochrome and blue, formed where light struck the sensitized surface. Objects placed on the coated support leave pale silhouettes against deep Prussian blue, giving flat, high-contrast shapes with soft edges. Botanical specimens, lace, seaweed, and structural subjects read as delicate white forms. Surfaces show the texture of the paper or cloth, and toning can shift the blue toward violet, green, brown, red, or black.
Palette and type
The dominant colour is Prussian blue, ranging from pale washed cyan to deep saturated navy, with white or cream reserved for unexposed areas. Toning can introduce violet, green, brown, red, or black. Typography is usually absent or minimal, with hand-lettered labels or simple serif captions on albums and blueprints.
What it signals
Cyanotype signals early photography, scientific record-keeping, and hand-made botanical study. Its blue monochrome reads as nostalgic, quiet, and technical at once, suggesting archives, field notes, and craft process rather than commercial polish.
Where it works
It suits botanical prints, zines, textile patterns, editorial illustration, and archival or scientific-themed design. It works less well where full colour or fine tonal detail is needed, and the blue can feel repetitive if overused across a whole layout.
Related styles
Sources
- Cyanotype, Wikipedia accessed 2026-10-23