fizx on "[Plugin: MailPoet Newsletters] mailpoet forms"

Hello,

I am using Mailpoet and i dont like its front end, Can someone help me Change the Forms Background Color and give it a border so its highlighted and not look like this.

http://i.imgur.com/isf0YSE.jpg

fiz-x.com

Thank you so much.

https://wordpress.org/plugins/wysija-newsletters/