pvbemu/app/theme/virtual.css

:root {
    --close            : #aa0000;
    --close-blur       : #550000;
    --close-blur-border: #aa0000;
    --close-blur-text  : #aa0000;
    --close-border     : #ff0000;
    --close-text       : #ff0000;
    --control          : #000000;
    --control-disabled : #aa0000;
    --control-focus    : #550000;
    --control-shadow   : #aa0000;
    --control-text     : #ff0000;
    --desktop          : #000000;
    --selected         : #ff0000;
    --selectedBlur     : #aa0000;
    --selectedText     : #550000;
    --selectedTextBlur : #000000;
    --splitter-focus   : #ff000099;
    --title            : #550000;
    --title-blur       : #000000;
    --title-blur-text  : #aa0000;
    --title-text       : #ff0000;
    --window           : #000000;
    --window-border    : #ff0000;
    --window-disabled  : #aa0000;
    --window-text      : #ff0000;
}

[filter] {
    filter: url("data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjxmaWx0ZXIgaWQ9InYiPjxmZUNvbG9yTWF0cml4IGluPSJTb3VyY2VHcmFwaGljIiB0eXBlPSJtYXRyaXgiIHZhbHVlcz0iMSAwIDAgMCAwIDAgMCAwIDAgMCAwIDAgMCAwIDAgMCAwIDAgMSAwIiAvPjwvZmlsdGVyPjwvc3ZnPg==#v");
}