Each culture has slightly different associations with colors. We tend to assume everyone sees colors the same way as we do, but some cultures have very different ideas about color. Black, for example, is associated with death in most cultures, but in Japan symbolizes nobility and experience. Green, on the other hand, is typically associated with things like life, luck, fertility, and wealth, but in Malaysia is linked instead to danger. In China, white is the color of death and mourning in addition to the typical purity.
However, outside of the marketing world, these associations can simply be interesting. Even within cultures, colors can have extremely ambiguous meanings. Common Japanese phrases associate blue with outsiders, anxiety, vegatables, and brothels. Our associations with color are varied and perpetually changing, which is what makes them so appealing.