Hello,

To remove the blog post author and date, please add this code into your custom css box:

.blog-article.grid-style .info {
    display: none;
}

To change the button’s color (i am assuming it’s the font color and the border) add this code:

.btn-bt.default {
    color: #149418;
    background: rgba(255,255,255, 0.00);
    border-color: rgba((15, 165, 20, 0.2);
}
.btn-bt.default:hover {
    color: #0C6713;
    background: rgba(255,255,255, 0.00);
    border-color: rgba(29, 140, 22, 1.00);
}

Change the values to your wish.
If you did not meant this for the button, please let me know.

Best regards!