Interaction of Luminous Color and Interior Surface in Multifunctional Workspaces With Different Task Types

ABSTRACT Recent trends in telecommuting have increased the need for workspaces that support multiple task types within a single physical environment. Lighting design plays an important role not only in ensuring visual performance but also in supporting occupants' comfort and well‐being. This study conducted a subjective experiment to investigate the potential of luminous color, in interaction with interior surface conditions, as a means of gently differentiating zones within a multifunctional workspace. Fourteen lighting conditions were evaluated by combining four luminous colors with two wall‐surface finishes. Task performance, subjective evaluations, and physiological responses were measured. Although the results should be regarded as exploratory rather than conclusive, subjective evaluations indicated that certain lighting and wall‐surface combinations influenced perceived workspace suitability. In particular, white light combined with low‐reflectance woodgrain‐pattern textiles was consistently rated as suitable for both individual tasks and group discussions. These findings suggest that luminous color may influence perceived workspace quality through interaction with interior surface properties, even though its effects on objective performance measures were limited under the present experimental conditions. Further research in larger and more realistic office environments is required.