How to change font-color for disabled input?

You can’t for Internet Explorer.

See this comment I wrote on a related topic:

There doesn’t seem to be a good way,
see:
How to change color of disabled html controls in IE8 using css
– you can set the input to readonly instead, but that has other
consequences (such as with readonly,
the input will be sent to the server
on submit, but with disabled, it won’t
be): http://jsfiddle.net/wCFBw/40

Also, see: Changing font colour in Textboxes in IE which are disabled