Relevance of color to cobranding. In contribution to the branding and design literature, we identify the importance of visual similarities in brand alliances. Literature on the topic of product design has investigated congruence between colors or between color and shape (Becker et al. 2011; Deng, Hui, and Hutchinson 2010) and visual similarity to a prototypical design (Landwehr, Wentzel, and Herrmann 2013; Liu et al. 2017), but not between two brands. In a single brand context, research into color effects considers the fit with brand personality (Labrecque and Milne 2012) or product category (Doyle and Bottomley 2006). It is worth noting that sponsorship alliances feature a unique power dynamic, in which the team has an existing positive relationship with the customer, and the other brand pays to leverage this established relationship. Further research should investigate whether visual congruence might be less helpful when these power dynamics are more balanced or the direction of the color alteration reverses (e.g., a team adopts the brand’s colors). Continued research should also examine aspects of visual congruence other than color (e.g., font, shape and other visual elements of brand logos) and confirm if the effects we find extend to other forms of brand alliances.