The best way to add a bit of color to your site is by making good use of great imagery. Finding matching images for your posts can be difficult every now and then, but getting those images to show in a consistent manner throughout your site can be a pain. What I mean specifically is when you have finally found a matching image it most likely will not have the perfect resolution.
Perhaps you have noticed here on BloggingPro most images in post do not exceed the 240px range, but of course not all images can be found in exact that width. Most of the time you need to crop or resize those images you found to the proper width size.