Dive summary: 

• Certain image elements result in more repins on Pinterest; this infographic from Curalate identifies those data-backed elements to help you achieve more repins. [see full infographic  at HubSpot]
• Images that are reddish-orangish received twice as many repins as images that are blue. 
• Images without  a face receive 23 times more repins than images with a face. 

From the article: 

"But we don't often hear about optimizing one of the most important pieces of content on Pinterest: the image itself. Are there certain color balances, layouts, and sizes that perform better than others? Seems like a pretty important thing to optimize on an social network that's all about sharing visual content."