In terms of branding, it is no coincidence that yellow and red seems to reappear.
Red evokes appetite and hunger. Yellow is considered to be a happy and friendly colour. In combination, they also raise a busy feeling for the viewer. Therefore, the combination is likely to be used by fastfood chains as they want people to come inside, eat and leave, instead of giving a comfortable atmosphere that invites people to stay and chat longer.

Fig. 1

Surely, other factors like interior, music choice and volume, smell and many other characteristics support those factors. However, also the colour seems to be well-thought rather than quickly picked (Karen Haller, 2016).

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Fig. 2

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All References:

Karen Haller (2016) Branding – Why red & yellow is used by the fast food industry. Available at: (Accessed: 4 June 2016)