atom.less

.tree-view {
  font-family: 'Souce Sans Pro', 'Ubuntu Mono', Monaco, monospace;
  font-size: 17px !important;

  .list-tree .entry {
    line-height: 1.5;

    .name {
      color: #aaa;
    }

    &.selected > .name,
    &.directory > .list-item > .name {
      color: white;
    }

    &.status-ignored > .name,
    &.status-ignored > .list-item > .name {
      color: #666;
    }

    &.directory > .list-item > .icon:before {
      color: goldenrod;
    }

    &.status-modified > .name,
    &.status-modified > .list-item > .name {
      color: gold;
    }

    &.status-added > .name,
    &.status-added > .list-item > .name {
      color: lightgreen;
    }
  }
}

atom-text-editor {
  font-family: 'Souce Sans Pro', 'Ubuntu Mono', Monaco, monospace;
  background: #020202;
}