Change an HTML5 input's placeholder color with CSS

Question

Chrome supports the placeholder attribute on input[type=text] elements (others probably do too).

But the following CSS doesn\'t do anything

Answer 1

In addition to toscho's answer I've noticed some webkit inconsistencies between Chrome 9-10 and Safari 5 with the CSS properties supported that are worth noting.

Specifically Chrome 9 and 10 do not support background-color, border, text-decoration and text-transform when styling the placeholder.

The full cross-browser comparison is here.