Content Background transparency

There is no transparency in my theme demo, however, you can implement it using RGBA color.

For instance to create transparent wrapper div you can add this code to Theme Options – Other – Custom CSS

.wrapper {
    background-color: rgba(255,255,255,0.4);
}

Last number (0.4) stands for transparency where 1 means no transparency at all and 0 means complete transparency.

You can use the same code for other elements as well, such as article

article {
    background-color: rgba(255,255,255,.4);
}