Update of colors in the Dark Theme

[Daniel Dekel]

I wanted to let you know that as part of a bigger back-end update,  we've updated the Dark Theme to use a grey range of colors instead of the previous one that used a blue range.

This change was done because several customers complained about it when we switched to the new UI. This is more aligned with dark themes used in other websites and apps.

To those who use Dark Theme, I hope this is a beneficial update. If you find any issues please don't hesitate to comment in our community forum. 

The change will be available in our next core-ui build.

Thank you,

Daniel