Some individuals prefer to include their best loved colors on their blogs. Therefore, you must get wordpress themes which consist of your preferred colors as possible, even though, there are loads of WP themes that will suit every necessity. The advantage of opting for a theme with the desired color is that you would not have to do any more alterations since you are satisfied already with the appearance.
However, you should not merely center on this factor as you would have other concerns to consider like the layout. Some themes come in 2 column themes or 3 column themes which may be appropriate for the type of blog you are developing.