Hi,

1/ To do that, please add more this code to Customize > Custom CSS:

.penci-readmore-btn.penci-btn-make-button a{ background-color: #ff0000; color: #ffff00; }

You can change color code ff0000 and ffff00 on above code to other colors code. You can get a color code here

2/ Please add more this code to Customize > Custom CSS to do that:

.post-entry .penci-portfolio-filter ul li, .penci-portfolio-filter ul li{ float: none; }

Best Regards,

PenciDesign