Go to your specific Live Editor >> click on Page Setting >> Other Scripts >> Custom CSS >> look for the CSS code below to change the background color:
/* For Background image Overlay Color*/ .opacity-background { background:rgba(64,19,79,0.5); } /* For Feature Box Opacity Color*/ .white-border-opacity { border: 5px solid white; background:rgba(64,19,79,0.5); }
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Important
You will have to change the RGB color and the 0.5 opacity. You can find the RGBA color here: https://developer.mozilla.org/en-US/docs/Web/CSS/CSS_Colors/Color_picker_tool