A few weeks ago I wrote about the use of unique colors in trademarks and logos as a potential way to differentiate your brand. Like using distinctive colors as part of a trademark, many companies use distinctive colors on their actual products to act as source identifiers.
While a color trademark for a product does take longer to achieve (such a mark is not inherently distinctive but can achieve trademark registration through a showing of acquired distinctiveness, often by five or more years of continuous use) it can be a great non-verbal brand identifier.
Please see full publication below for more information.