Karen Haller FRSA is a global expert in Behavioural Design and Colour Psychology. She helps businesses and design professionals use colour and design to support mental health, enhance well-being, and create positive, nature-aligned change.

Karen consults and collaborates with companies looking for innovative solutions to social problems who seek new ways of improving the human experience in balance with nature. Her clients included architectural and design practices and leading global brands.

She has helped hundreds of design professionals around the world to deepen their knowledge of colour through her sought-after colour and design psychology courses and mentoring programmes.

Karen is the author of bestselling The Little Book of Colour as well as being an in-demand media commentator, international speaker and design awards judge.