mengler12
Hi
To change the colors add below code in custom css present in the template style options and change the color codes as per needs.
For Readmore button that is showing in Gray color use below code
.offer-list .mod-articles-category-readmore .btn {
background: #d3d5df;
color: #444a5e;}
For 25% Off All Design and STAY-HOME (OFFER & COUPON) use below code
.offer-list .offer-details {
color: #267ffd;}
.offer-list .offer-coupon .value {
border-bottom: 1px dashed #F44336;
color: #F44336;}
For get offer link use this code
.offer-list .offer-coupon .btn-get-offer:hover, .offer-list .offer-coupon .btn-get-offer:focus, .offer-list .offer-coupon
.btn-get-offer:active {background-color: #267ffd;}
offer-list .offer-coupon .btn-get-offer { background-color: #858a9e;color: #fff;}
An easy way to check such style code is use right click from your mouse on the item you want to change color > inspect element > it will show the code : http://prntscr.com/sfq5s9
Regards