Maciej Trzepałka is a cartoon artist and children's books illustrator. His exhibition Colourful Shades of Grey is comprised of 69 works, and its title refers to sweet and bitter aspects of surrounding us reality. Trzepałka artworks are mostly done in ink, occasionally filled with colourful crayons. His illustrations feature people, animals, and objects. The themes of his works are often very serious, albeit satirical in nature. The artist tackles ecological and political issues, employing humour to convey his message.