Colour of calculated field

Hi all,

First of all thanks for this plugin! It took me a while to find but it does excactly what i would like it to do.

The output of the calculated field (0.05%*input value) stays however white, meaning that i can only see the calculated price when i select the output field. Therefore my question is:

How can i change the colour of the price in output field?

[URL=https://s930.photobucket.com/user/harald159/media/Example%20woo%20price%20calc.png.html][IMG]https://i930.photobucket.com/albums/ad148/harald159/Example%20woo%20price%20calc.png[/IMG][/URL]

Many thanks in advance