I am currently using the 'createTheme' function to personalize the theme of my TextField input component in Material UI.
To implement the desired changes, I am referring to the default theme for Material UI on https://mui.com/customization/default-theme/ and adjusting the relevant labels accordingly.
Specifically, I aim to modify the default border of the TextField when it is not being hovered over or focused. The current color of this border is grey.
Could anyone provide guidance on which label in the default theme corresponds to this particular border? I have been unable to locate it thus far.