Waveform Background Color
video-wave-bg-color
The video-wave-bg-color parameter sets the background fill color for the waveform bounding box. Accepts the same hex color format as video-wave-color: a 6-digit RGB (RRGGBB) or 8-digit RGBA (RRGGBBAA) value, with an optional leading #. The default is FFFFFF00 (fully transparent).
Use an RGBA value with a low alpha channel (e.g., 00000080) to create a semi-transparent background panel behind the waveform, improving legibility over complex video content.