Harald Arnkil (b. 1954) is a Finnish artist, colour researcher and educator. After studying art and interior design in the UK, he graduated with a Master’s degree in painting from the Finnish Academy of Fine Arts in 1979. Arnkil is a Senior University Lecturer in Colour Studies at Aalto University School of Arts, Design and Architecture, where he has worked continuously since 1987. Arnkil has published numerous articles and conference papers dealing with colour perception and colours’ role in art, design and architecture. He has written Colours in the Visual World (2013), a textbook on colour for artists, designers and architects. Arnkil is currently working on a doctoral thesis on the subject of Colour in the Artistic Process. His other research interests include the relationship of colour, light and space and the relationship between colour and music.