Refonte des Couleurs d'une Affiche Infographique

Adjust the color palette of this educational infographic poster to be more harmonious, modern and visually appealing. Keep ALL original text, layout, and content exactly the same. You can replace the illustrations with similar ones that maintain the same theme (diverse people, books, social research icons, magnifying glasses, gears, etc.) but update the colors to a cohesive, professional palette.