Background color in diagrams

Hello. I’m evaluating VP-UML. I have a problem with the color of background in diagrams. The color in VP-UML is set to RGB(255, 255, 255) i.e. white, but when I export the diagram as an image, the color is changed to RGB(248, 248, 248 ). Thus, when printing the diagram I can see grey background. Why?

Thank you for your message. Could you mind tell me more details about your problem, such as OS, the build number of VP that you are using, the way to export the diagram also which format that you are exporting? If possible, could you please also send me your project to have a look? Please send it to directly. Thanks in advance!

Best regards,