Text box color not filling in entire widget

[ParkerLampman]

I am trying to create a dashboard that is completely black. When I use a text box to display a title of my dashboard and have this text box in-between two other widgets I get a white border around my textbox and cannot figure out how to remove it. Has anyone experienced this same issue?

Below are images of the error I am seeing. You can see that when I use a widget that isn't a textbox there is not white bar separating the widgets, but my text boxes all have them.

Image of dashboard error:

[Wojtek]

Try this dashboard script 

dashboard.on('widgetready',function(d) {
$('.dashboard-layout-column').css('background-color', '#000000'); 
$('.dashboard-layout').css('background-color', '#000000');

});

Wojtek

[ParkerLampman]

Thank you! I forgot to mention I had that script in the dashboard already, but I still get the weird white lines around my textbox. If I move the textbox to not have any widgets next to the text box the lines below go away and the one to the right stays. But when I move the widgets to how I want to format them the text boxes show up. Attached are some images to show what I am seeing.

Stacked with only the white bar to the right.

How I want the format to be:

Any insights?