Can I use
?

CSS unset value

- CR

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

IE

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

Edge

  1. 12: Not supported
  2. 13 - 85: Supported
  3. 86: Supported

Firefox

  1. 2 - 26: Not supported
  2. 27 - 80: Supported
  3. 81: Supported
  4. 82 - 83: Supported

Chrome

  1. 4 - 40: Not supported
  2. 41 - 85: Supported
  3. 86: Supported
  4. 87 - 89: Supported

Safari

  1. 3.1 - 9: Not supported
  2. 9.1 - 13.1: Supported
  3. 14: Supported
  4. TP: Supported

Opera

  1. 9 - 27: Not supported
  2. 28 - 70: Supported
  3. 71: Supported

iOS Safari

  1. 3.2 - 9.2: Not supported
  2. 9.3 - 13.7: Supported
  3. 14: Supported

Opera Mini

  1. all: Not supported

Android Browser

  1. 2.1 - 4.4.4: Not supported
  2. 81: Supported

Blackberry Browser

  1. 7: Not supported
  2. 10: Not supported

Opera Mobile

  1. 10 - 12.1: Not supported
  2. 59: Not supported

Chrome for Android

  1. 85: Supported

Firefox for Android

  1. 79: Supported

IE Mobile

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

UC Browser for Android

  1. 12.12: Supported

Samsung Internet

  1. 4 - 11.2: Supported
  2. 12.0: Supported

QQ Browser

  1. 10.4: Supported

Baidu Browser

  1. 7.12: Supported

KaiOS Browser

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