Override CSS for Private Messaging 'compose' button style

Hi! :slight_smile:

On Private Messaging, I'd found the provided tips to re position the 'compose' button to the left of the other buttons, but I would like to change the CSS color style of the button all around.

I did some snooping about, alas I have given up.... Could you please give me a complete sample of the CSS for the compose button style? I can take any sample and go from there to modify it and tweak it.

Many thanks!