Hi there, thanks for spotting this! The issue comes from the PrimaryColorOverride in login.dart. We're using primaryColor when we should be using accentColor.

I'm working on updating the code and docs, in the meantime, all you need to get it working is to change primaryColor to accentColor in the build method of PrimaryColorOverride.

See pull 114 for more info.

Codelab has been updated, as well as the code itself, to override the accentColor instead of the primaryColor. Thanks again for spotting this!

Hi,

I tried cloning your repo at your latest commit, and I was actually able to get it working as intended. Just to clarify, what we are overriding is the color of the text field outline, only after the text field has been selected.

Hope this helps, let me know if you have any more questions.

Hello, Thank you for having taken the time to look at my GitHub. I have a last concerned, if I am using theme 01 the overriding does not work, if I am using theme 02, the overriding works. I have renamed the themes to clarify the situation but do not understand why it is only working if I am using theme number 02. Perhaps You can tell me. Thanks in advance.

Hm, I can't actually figure out what's going on. My original fix actually was not complete. It turns out that when our ThemeData (in app.dart) uses the ThemeData.light() theme as a base, the TextField border color is determined by primaryColor. But when we use the ThemeData.dark() theme as a base, the border color is determined by accentColor.

@willlarche do you happen to know why this is?

Don't know why this is but accept that it is :) We've updated the code to use accentColor. Should be good to go.

Oh, this isn't a case of technical mystery. If you follow the calls, you can find the code. https://github.com/flutter/flutter/blob/fc1b304326214296ac02bddfed9396e2a716e63d/packages/flutter/lib/src/material/input_decorator.dart#L1588

The mystery is why that logic is how it is. This was long before we had a Material Theming spec. So, the Flutter team had to make decisions. And they did a really great job. Material Theming ended up having different rules for text inputs but it came years later.