Reply To: Trying to add horizontal opt-in box in welcome widget wide – need help!

Take a look around line 2167 in your css for this –

input, 
select, 
textarea {
    background-color: #FFFFFF;
    border: 1px solid #DDDDDD;
    padding: 0.3125rem 0.625rem;
    width: 100%;
}

and remove the width.

The background can be changed on line 3365 –

.epik-orange #head-wrap, 
.epik-orange #welcome, 
.epik-orange #home-feature-bg-dark, 
.epik-orange .author-box, 
.epik-orange .footer-widgets {
    background: none repeat scroll 0 0 #C37A1C;
    color: #F0F0F0;
}

But you’ll need to separate the #welcome part of the code and change the color so the other parts aren’t affected.