Nemp - Skins
You can adjust the appearance of Nemp with "skins". There is no skin editor at the moment, but you can play along with the bitmap files in the skin directory to create your own. Color settings and button sizes can be changed in the "skin.ini".
Here are some other skins you may like.
Click on the image, download the zip file and unzip it into then skin directory of Nemp. You need to restart Nemp to use the new skin.