Colour is a critical environmental stimulus influencing the productivity of users in a coworking space. This study investigates to explore the effects of using light-muted, dark-muted and vibrant colours on the creative productivity of Generation Z users (born between 1995 and 2015) in coworking spaces. While user preferences tend to favour light-muted walls and tend to avoid vibrant hues, such as red, yellow and green, experimental finsings with 21 purposively selected respondents in a virtual coworking space showed that dark-muted colours were more conducive to productivity. This was evidenced by a higher number of ideas generated in modified Wartegg and Finke creativity tasks and further supported by Associative Conceptual Network Analysis (ACNA) of verbal protocols, which revealed greater conceptual depth. Psychological responses related to focus, mood and comfort also found to mediate these effects. Overall, a dark-muted colours appear to optimally support productive behaviour in coworking spaces.