HLN (formerly CNN Headline News) is CNN's sister channel in the US, offering news in the day and various "true crime" shows at night. It has had a hard time defining itself, but has recently decided to focus on stories relevant to middle America with the tagline "News that hits home". Perhaps as a part of this strategy, it introduced a new logo yesterday (May 8).
The HLN logo was redesigned as as recently as 2015. The new logo is a simpler rendition of the network's name, dropping the speech bubble holding shape. On screen it appears in a blue square.
NewscastStudio has more coverage of the new graphics.