Iframe farver i scrollbar?

Hvorfor virker den her kode ikke?

Style
.f {
  scrollbar-3d-light-color: #669900;
  scrollbar-arrow-color: #000000;
  scrollbar-base-color: #000000;
  scrollbar-dark-shadow-color: #ffffff;
  scrollbar-face-color: #c5c5c5;
  scrollbar-highlight-color: #ffffff;
  scrollbar-shadow-color: #ffffff;
}

HTML
<iframe class=\"f\" name=\"pappa\" src=\"indhold.html\" width=\"100%\"  height=\"380\" scrolling=\"auto\" frameborder=\"0\" border=\"0\"></iframe>

Hvad skal jeg gøre for at få farver i scrollebaren?