It is a strong color that can not be ignored.
Likewise, most people have a strong opinion of purple: they really like it, or vehemently dislike it.
To some people, purple has spiritual connotations.
Purple could also represent higher consciousness and spiritual protection.
A version of purple is also the color of the crown Chakra.
When interpreting this color consider all of the details in the dream and try to make connections between the above mentioned-ideas and your current issues.
See also: Colors
The color purple featured strongly in a dream symbolizes personal transformation and spiritual growth for the dreamer.