Solved

How to change the team colour?

Which phone is that? Works fine on my phone and it's an old Samsung S3. It uses the standard HTML colour picker.

I will look into this later, I can reproduce the issue on Safari for Windows. If I fix it there it should fix it across the board on Apple devices.

Thanks for bringing it to my attention.

Ok, so it took a little while, but I've just applied an update with a totally new colour picker. It overrides the default browser format with a custom one.

Try now in Safari and on iPhones and let me know how it goes.