Here you go!
For this start I'm sending two skins.
This is based on black original skin but slightly different with knobs more distinct and a soft black color.
This is more a sunshine approach with Filter Mix knobs with yellow mark.
Just unzip the ZIP package into ANA 2 GUI folder, those skins are self contained into a folder, you will then have a new skin folder ( i.e 'Soft Blue Black' or 'Sunshine Yellow ) next to the additional 'Black' one.
After adding the new skins, just open an instance of ANA 2 and click the "wheel" icon above 'Menu' to access settings and use the 'SKIN SELECT' drop down menu to see & load your new custom skin.
WINDOWS Users : C:\ProgramData\Sonic Academy\ANA 2\GUI folder.
MACOS Users : yourmacosHDD/Library/Application Support/Sonic Academy/ANA 2/GUI folder.