OutlinedInput receives background on search inputs on iOS

[nicbarajas]

When viewing an OutlinedInput with a search input type, it does not override the background color which means the color remains white regardless of the context. I wasn’t sure if this was potentially related to #29151 so I wanted to make sure I filed this separately, as it’s happening out of the box.

• The issue is present in the latest release.
• I have searched the issues of this repository and believe that this is not a duplicate.

Current Behavior 😯

The input is always white, regardless of the theme.

Expected Behavior 🤔

The input type should not affect the display of the background color.

Steps to Reproduce 🕹

CodeSandbox: https://codesandbox.io/s/withered-shadow-s58f4

Your Environment 🌎

This can be seen on Safari when running on iOS or iPadOS 15.1.

[mnajdova]

It could be related to #23332 Could you try if it works with set WebkitTextFillColor?

[nicbarajas]

@mnajdova I’m not really familiar with contributing here but I can give it a shot if you’d like!