Hi
if you want to change the red bg color comes after hover on item .
Go to /templates/ja_jason/css/home.css
find this code and change the bg color code ( background-color: #ff3334;) with your color
.ja-home-2 .ja-masonry-wrap .item article .article-desc {
position: absolute;
background-color: #ff3334;
opacity: .9;
color: #ffffff;
bottom: -100%;
right: -100%;
padding: 44px;
width: 100%;
height: 100%;
-webkit-transition: all 0.4s ease 0s;
-o-transition: all 0.4s ease 0s;
transition: all 0.4s ease 0s;
}
The article text color showing in black because the color is added by article editor .
You can open the article and change or remove the color > http://prntscr.com/ali77p