12. The method of claim 11 , wherein determining the weight for the at least one color attribute comprises determining a weight for each of the at least two color attributes based on the at least some color themes in the collection associated with the tag and the at least some color themes in the collection not associated with the tag.
12. The method of claim 11 , wherein determining the weight for the at least one color attribute comprises determining a weight for each of the at least two color attributes based on the at least some color themes in the collection associated with the tag and the at least some color themes in the collection not associated with the tag. 13. The method of claim 12 , wherein estimating a descriptiveness value further comprises using the at least two color attributes and the weight for each of the at least two color attributes.