Better look.

* Centered the coordinates label.
* formatted it. "(100,100)" => "100 x 100"
* Coordinates Label has now the same color as the user-chosen color
* Coordinates Box is now a bit darker than the user-chosen color (-0x33)

examples:
![ccffcc](https://f.cloud.github.com/assets/5861085/1691884/4a743cb4-5e6c-11e3-8360-83b2bac461ec.png)
![ff0000](https://f.cloud.github.com/assets/5861085/1691885/544289b2-5e6c-11e3-89c4-433f435c0c6d.png)
![f0f0f0](https://f.cloud.github.com/assets/5861085/1691886/5c80808e-5e6c-11e3-9fdf-e6269f1a6f4a.png)