How to set TextInputLayout error message colour?

Question

How can I change the colour of the error message that can be set to appear below the text field in a TextInputLayout (via setError(...) – see error

Answer 1

One side note. I have tried the accepted solution one with errorTextAppereance. It works really good but at first, the input underline color was not changing after applying a new errorTextAppereance style. I see there are a few comments and that other people are experiencing the same issue.

In my case, this was happening when I was setting a new style after setting a new error text. Like this:

passwordInputLayout.error = "Password strength"
passwordInputLayout.setErrorTextAppearance(R.style.InputError_Purple)

After switching the order of this two methods the text and underline color changes as expected.

passwordInputLayout.setErrorTextAppearance(R.style.InputError_Purple)
passwordInputLayout.error = "Password strength"

And the error text appearance style looks something like this: