I'm not seeing a difference in your screenshots. This is what I have for the code:
/* BLOG TITLES */
h1.BlogItem-title {
color: #397585;
font-size: 50px;
font-family: DIN-Condensed !important;
}
I tried this and it affected the colour but not the font.
h1.BlogItem-title { color: #397585; font-size: 50px; font-family: DIN-Condensed !important; }