Setting background gradient in Valo theme

Hi.

I'm trying to set a gradient (with "background: linear-gradient...") as the background of my website. I'm using Valo as the base theme. In Reindeer this worked fine, but in Valo not so much. The "$v-background-color" seems to override the gradient. I can set a "background-image:" which seems to work, but having a gradient in image doesn't produce as good a result as true gradient.

Any way to get the linear-gradient to work?

Current mytheme.scss contents:

$v-background-color: #d7d7d7;

@import "../valo/valo.scss";

@mixin mytheme {
  @include valo;

  // Insert your own theme rules here
  //background-image: url("images/bgr_gradient.png");
  background: linear-gradient(to right,  #564b46 0%,#969696 28%,#bab6b6 51%,#8c8779 100%);
}

Example using Bourbon (http://bourbon.io/):

@import "../valo/valo.scss";

@mixin theme {
  @include valo;
  
  &.v-app,
  &.v-app-loading {
    @include linear-gradient(to top, red, orange);
  }
}