Can I use
?

CSS unset value

- REC

A CSS value that's the same as "inherit" if a property is inherited or "initial" if a property is not inherited.

Chrome

  1. 4 - 40: Not supported
  2. 41 - 107: Supported
  3. 108: Supported
  4. 109 - 111: Supported

Edge

  1. 12: Not supported
  2. 13 - 106: Supported
  3. 107: Supported

Safari

  1. 3.1 - 9: Not supported
  2. 9.1 - 16.0: Supported
  3. 16.1: Supported
  4. 16.2 - TP: Supported

Firefox

  1. 2 - 26: Not supported
  2. 27 - 106: Supported
  3. 107: Supported
  4. 108 - 109: Supported

Opera

  1. 9 - 27: Not supported
  2. 28 - 91: Supported
  3. 92: Supported

IE

  1. 5.5 - 10: Not supported
  2. 11: Not supported

Chrome for Android

  1. 107: Supported

Safari on iOS

  1. 3.2 - 9.2: Not supported
  2. 9.3 - 16.0: Supported
  3. 16.1: Supported

Samsung Internet

  1. 4 - 18.0: Supported
  2. 19.0: Supported

Opera Mini

  1. all: Not supported

Opera Mobile

  1. 10 - 12.1: Not supported
  2. 72: Supported

UC Browser for Android

  1. 13.4: Supported

Android Browser

  1. 2.1 - 4.4.4: Not supported
  2. 107: Supported

Firefox for Android

  1. 106: Supported

QQ Browser

  1. 13.1: Supported

Baidu Browser

  1. 13.18: Supported

KaiOS Browser

  1. 2.5: Supported
Resources:
WebKit bug 148614: Add support for the `unset` CSS property value
MDN Web Docs - CSS unset
Resetting styles using `all: unset`