Many of the most well known brands are easily recognisable by their brand colours, the golden arches of the McDonald's logo are a good example and demonstrate that brands strategically use colours to appeal to customers. 

This infographic from Marketo explores what brand colours can mean for businesses. Research has found that different colors provoke very different reactions in people. Marketo choose to use the color Purple for branding because at the time Marketo was founded, purple was relatively un-used. Additionally, purple represents wealth, royalty, and richness which also has associations to leadership and revenue. 

This infographic comes from Marketo