Why is there a space left and right of my div?

render() {
return (
<div className="container intro-body">
<div className="row">
<h2 className="intro-name center-block">TEXT</h2>
</div>
</div>
)
}
And in mine css:
.intro-body {
height: 500px;
background-color: #3BC5C3;
}
I tried installing bodyin margin: 0and padding: 0, considering that this was due to the default values for Bootstrap, but that did not work. I also don't have a container, so why does it still have a gasket?
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