How to change TextField's UNDERLINE color.

[MatsuSpring]

Question

I'm trying to change the color of the underline in a TextField control where the border property is set to ft.InputBorder.UNDERLINE.
However, even when I try to change the color using the border_color property as shown in the code below, the underline color remains the same.

Is this a known limitation of Flet, or am I missing something?
Does anyone have any suggestions or solutions?

(Apologies if the English translation is a bit awkward, as it was generated by Gemini.)

Code sample

import flet as ft

def main(page: ft.Page):
    tf = ft.TextField(
        label="Input Name",
        border=ft.InputBorder.UNDERLINE,
        border_color=ft.colors.ORANGE
    )

    page.add(tf)

ft.app(main)

Error message

No response

------------------------------------------------------

• I have searched for answers to my question both in the issues and in previous discussions.

[ClearSafety]

The property used to change the border color is 'border_color' that seems to be incompatible with the property 'border'.
I couldn't find a way to change the underline border color.
The only way to change its color is using the property 'focused_border_color', but it works only when the field is focused.

I suggest you to raise an Issue

[ndonkoHenri]

Created an issue: #4140