[Xrystal]

This is an xml file for one of my frames and shows what I had and what I changed it to. It should help you see what you need to change.

<Frame name = "XMP_BackdropTemplate" inherits = "BackdropTemplate" virtual = "true">
 
vvvvv New Code
    <KeyValues>
        <KeyValue key="backdropInfo" value="BACKDROP_TOOLTIP_16_16_5555" type="global"/>
        <KeyValue key="backdropColor" value="BLACK" type="global"/>
        <KeyValue key="backdropBorderColor" value="WHITE" type="global"/>
    </KeyValues>
^^^^        
 
vvvv Old Code
        <!--Backdrop 
            bgFile="Interface\Tooltips\UI-Tooltip-Background.png" 
            edgeFile="Interface\Tooltips\UI-Tooltip-Border.png" 
            tile="true" >
            <EdgeSize val="12"/>
            <TileSize val="16"/>
            <BackgroundInsets left="5" right="5" top="5" bottom="5"/>
            <Color r = "1" g = "1" b = "0" a = "1" />
            <BorderColor r = "0" g = "1" b = "1" a = "1" />
        </Backdrop-->>              
^^^^
 
    </Frame>

And this file shows you the presets available and how you can create your own if none of them suit your needs.

https://www.townlong-yak.com/framexml/live/Backdrop.lua