Hi,

You can add more this code to Customize > Custom CSS to do that:

.container-single .post-entry .post-tags a{
    text-transform: capitalize;
    font-size: 12px !important;
    border-color: #ff0000;
    background: #fffb80;
    color: #000000;
}
.container-single .post-entry .post-tags a:hover{
    border-color: #ff0000;
    background: #ff0000;
    color: #ffffff;
}

Change:

- The text 'capitalize' to 'none' on the above code to change the text to 'not capitals'

- Change value 12 to font size value as you want.

- Change all color codes on border-color, background and color to change border color, background color and text color. You can get a color code here

Best Regards,

PenciDesign