active-color($color)
  if luminosity($color) > .29
    darken($color, 10%)
  else
    lighten($color, 30%)

light-active-color($color)
  if luminosity($color) > .29
    darken($color, 5%)
  else
    lighten($color, 20%)

dark-active-color($color)
  if luminosity($color) > .1
    darken($color, 20%)
  else
    lighten($color, 20%)


hover-color($color)
  if luminosity($color) > .29
    darken($color, 15%)
  else
    lighten($color, 15%)

strong-active-color($color)
  if luminosity($color) > .29
    darken($color, 20%)
  else
    lighten($color, 80%)

composite-color($color)
  if luminosity($color) > .29
    darken($color, 35%)
  else
    lighten($color, 65%)

opposite-non-color($color)
  if luminosity($color) > .29
    black
  else
    white

max(value1, value2)
  if value1 <= value2
    value2
  else
    value1