_brand.yml

color: 
  background: '#1b1b1e'
  foreground: '#eeeeee'
  primary: '#4488dd'
typography: 
  fonts:
    - source: google
      family: 'Lato'
      weight: [100, 300, 400, 700]
    - source: google
      family: 'Source Sans Pro'
  base: 
    family: 'Source Sans Pro'
  headings:
    family: 'Lato'
  monospace: 
    background-color: background
    color: foreground
defaults:
  bootstrap:
    defaults: # defaults also supports a string as its value
      link-decoration: underline
      navbar-bg: "#224488"