gistfile1.yml

g: &font-color '#ff33ff'
g: &halo-color '#000000'

name: Style for airport point
feature-styles:
- rules:

  - zoom-levels:
      max: 10
      min: 12
    symbolizers:
      text:
        halo:
          radius: 2
          opacity: .6
          color: *halo-color
        fill:
          color: *font-color
        placement:
          point:
            x: .5
            y: .5
        font:
          weight: bold
          size: 10
          family: Droid Sans
        label:
          property: name