Black, gold and red are best for your business cards, but you can have these colours and others combined; for example, a black background with multiple colours.
Green symbolises vitality and growth and is a great colour to wear. To win on the sports field, don a green tracksuit. To get that promotion, wear a green suit, tie or scarf.
Purple is the colour of wealth, so place purple and green grapes in a commonly used area area. Double your chances with a lively green plant (artificial are fine) in the left corner of the office in a gorgeous purple pot.
One last tip – use this affirmation to make your business a money-making venture: "I am a money magnet. Business is excellent."