Background opacity for any Jqplot chart

Question

How it is possible to change background opacity for Jqplot charts? (I mean only for background).

Possible is change a color, or do backgroud transparent:

grid: { background: 'transparent' }

But what about opacity? I tried this, but does not work:

    $('.jqplot-grid-background').css({
        'opacity': '0.4'
    });

Answer 1

you have to give like

seriesColors:['rgba(100, 150, 100, 0.75)']

check this link jqPlot - How to change opacity or z-index of canvasOverlay?

Answer 2

I already solved by rgba defintion:

background: 'rgba(128, 128, 128, 0.2)'

The last parametr is opacity, the sample show background as light grey.