IDA - UI Candy

theme.css

/* Credit for this template goes to HexRays' Support! 
https://hex-rays.com/products/ida/news/8_2/ */

CustomIDAMemo
{
    qproperty-line-bg-default: rgba(0, 0, 0, 0.0);
    background: white url(/path/to/picture.png);
    background-attachment: fixed;
    background-repeat: none;
    background-position: bottom right;
}  

ecfringe_t
{  
    background: transparent;
}       

TextArrows
{ 
    background: transparent;
}

IDAViewHost
{
    background: white;
}