add variaable for header bg class

Bud Parr

16.14.2017 afa7a9d29a32c4e493e4dc895389876c4954aec4

add variaable for header bg class

 layouts/partials/page-header.html

@@ -14,7 +14,7 @@
  </header>
{{ else }}
  <header>
    <div class="bg-near-blackTK bg-black">
    <div class="{{ .Site.Params.background_color_class | default "bg-black" }}">
      {{ partial "site-navigation.html" . }}
    </div>
  </header>

 layouts/partials/site-header.html

@@ -16,7 +16,7 @@
  </header>
{{ else }}
  <header>
    <div class="pb3-m pb6-l bg-black">
    <div class="pb3-m pb6-l {{ .Site.Params.background_color_class | default "bg-black" }}">
      {{ partial "site-navigation.html" . }}
      <div class="tc-l pv3 ph3 ph4-ns">
        <h1 class="f2 f-subheadline-l fw2 light-silver mb0 lh-title">