Hi
if you want change color for "read more" text you can change it in module config in parameter: Link color
Or is you want changed button "readmore" please help me find and open file: modules/mod_jo_responsive_scroller_articles/css/settings.css go to line 76 and changed background (#c6c6c6) to other color
sb-retro-dark-skin .showbiz-button {
background: #c6c6c6;
border: 1px solid #151515;
font-size: 12px;
font-weight: 400;
padding: 4px 15px !important;
text-decoration: none !important;
text-shadow: 1px 1px 0 #000;
white-space: nowrap;
}
Best regards
Bach Pham