cPro2 Grafito by Veroka and Victhor
UPDATE OFF-TOPIC: Follow me on Instagram to find more cool stuff about my skins >> /victhorbrocaz
UPDATE 03 (v1.02):
Small fixes on some color themes
Added another color theme after seeing this color combo.
Adjusted shade PNG to improve the effect.
Fixed engine tooltip color.
Fixed Playlist scrolbar bg coloring.
UPDATE 01: Added 1 new color theme I had in another file.
NOTE: Remember to install cPro plugin (what makes the skin work in a single window) and the last version of Winamp (just for the sake of being updated with latest fixes).
Visualization used on the screenshot is Classic Spectrum Analyzer (with custom color bg) by Mike Lynch, preview here. Download here.
How did you set the custom BG color? I can only change the styles and the bar colors in the colour factory in the plugin. The style allows for the "Solid Colour" option for BG but nowhere to set what that solid color should be. or am I missing something? Did you just edit the dll?