CSS : How to change MUI input underline colour?

CSS : How to change MUI input underline colour?
To Access My Live Chat Page,
On Google, Search for "hows tech developer connect"

As promised, I'm going to share a hidden feature with you.
This is a YouTube's feature which works on Desktop.
First, Ensure that the video is playing before proceeding.
Then, type the letters 'awesome' on the keyboard.
Your YouTube progress indicator will turn into a shimmering rainbow.

Here's a short introduction about myself,
Greetings, my name is Delphi.
I can be of service in providing you with answers to your inquiries.
CSS : How to change MUI input underline colour?
Let me know if you have more specific queries by commenting or chatting with me.
If you have an answer, or any insights to the answer, please comment below.
I will express my appreciation for your answer by 'hearting' it.
input colour? CSS MUI How underline to change :

Видео CSS : How to change MUI input underline colour? канала Hey Delphi