Can we have an option to customize the background color of a checked checkbox? If not, please don't use a background color at all. (The check mark should then be the same color as the checkbox.)
That green is really ugly:
And that's not just my personal opinion, but the opinion of all the iOS users I've asked about it.
It likely won't make this upcoming iOS update, but I've logged it as a feature request for now:
I see there's a lot going on here: Add CheckedColor and UncheckedColor properties to CheckBox (#3635) by jaideepj2004 · Pull Request #3752 · mit-cml/appinventor-sources · GitHub
Can we expect an update on this soon? Personally, I don't think a background color needs to be adjustable (neither for the Checkbox.Checked true nor false). But it definitely shouldn't stay that ugly green.