In Buddhism, the colour yellow is treated with high regard, as the robes worn by Buddhist monks are radiant saffron yellow. Gautama Buddha chose the robe colour to represent a symbol of humility and separation from materialistic society.
In magic, yellow represents intellectual achievement, travel, moving house and career mindedness, and is linked to the planet Mercury.
But yellow does have some negative associations. Our relation to yellow can easily be thrown off balance, as it's also related to fears, nervousness and anxiety. This can be rectified by addressing the negative issues - facing fears, dealing with anxiety and nerves - and can be helped by rebalancing the chakras, doing reiki or other forms of healing.