setBackgroundImageRecolorOpacityStyle

Set the intensity of background image recoloring. Value 0, LV_OPA_0 or LV_OPA_TRANSP means no mixing, 256, LV_OPA_100 or LV_OPA_COVER means full recoloring, other values or LV_OPA_10, LV_OPA_20, etc are interpreted proportionally.