<Dynamically change the color of `firstInputTip` i...

# stackoverflow

[user]

Dynamically change the color of `firstInputTip` in hanks-zyh/PasscodeView
How can I dynamically change color of firstInputTip? I'm following instruction in here.
When I remove the assigned background color it automatically takes default white color then I can't get visuals on the firstInputTip or secondInputTip.

https://i.stack.imgur.com/xpmfo.png▾