[Input] Fix Errored Placeholder Text Color

[jholl]

see this fiddle

Any interest in working a little lighter coloring for the placeholders into default theme for input states? Could just be my eyes, I don't have any stats on accessibility or proper spec.

[jlukic]

Thanks

[jlukic]

@jholl Fixed in next, colors for error placeholder are much lighter
http://jsfiddle.net/gsw6zmqn/