You want to change desktop application colors? It's easy with CSS based rules. Just edit qss/lhc.qss file. You can edit file with notepad or any other text editor. If you managed to create really nice desktop client version, send me style file and I will credit your work and publish it as theme file.
Developing application takes a lot of time. You can support application by donating. There is no company behind this application and it takes away my free time. Every donation matters and does not matter how small it is!