Jessica Ridgway and Beth Myers conducted a study aimed to highlight the associations of colors used in logos with emotions:

• blue logos invoked feelings of confidence, success and reliability
• green logos invoked perceptions of environmental friendliness, toughness, durability, masculinity and sustainability
• purple logos invoked femininity, glamor and charm
• pink logos gave the perception of youth, imagination and fashionable
• yellow logos invoked perceptions of fun and modernity
• red logos brought feelings of expertise and self-assurance

This are nice hints that you can use in terms of brand and identity design, keeping however in mind that:

• Other factors might over-weight these associations
• The association is cultural