274 voteswe have this · AdminIan Mikutel (Sr. Product Manager, Microsoft Whiteboard, Microsoft OneNote) responded
This has been in Whiteboard for Windows 10 since Dec 2018. Please see my tweet for details: https://twitter.com/IanMikutel/status/1071092283364192256
An error occurred while saving the commentAnonymous commented
You can just Right-Click -> More -> Format Background where you can change the grid & the background colour from some presets but this should also include the RGB & HSL colour pallete that you can get in mspaint.exe or they could import the colour picker from KDE Krita or GNU GIMP.