COLOURS - Black + Red = Success

The power suit
When you need to command respect and attention
choose classic black suit.

Black gives you confidence and conveys power. However, combine it with other colours for maximum impact - otherwise it can make you seem aloof, unapproachable, and intimidating.
Of course, that might be the desired effect but if you really want to head for the top,
combine black suit with red accessories

Standard alternatives to black suit are not so successful.
Grey signifies cool, calm and in control but that you are not a major league player.

Brown can make you appear rather fixed and static. It is useful if you feel nervous and need security but avoid it if you need to turn on the power.