"Promotional Campaign Hook" - Product Promotion Popup Design
The color palette is great, but to increase the conversion rate adding a countdown will do the trick. It gives a sense of urgency.
It would be perfect for a popup like above. Some people ignore these popups or clicks cancel button immediately but as with countdown gets smaller, customers try to do the desired action.
Mobile version can be implemented with these strategies as well. Smartphone users are creating most of the web traffic these days.
You can freely create such designs or reach the designed popups through the website of ConvertFlow.