#rrggbbaa hex color notation

- UNOFF

The CSS Color Module Level 4 defines new 4 & 8 character hex notation for color to include the opacity level.

IE

  1. 5.5 - 10
  2. 11

Edge

  1. 12 - 18
  2. 79 - 81
  3. 83

Firefox

  1. 2 - 48
  2. 49 - 75
  3. 76
  4. 77 - 78

Chrome

  1. 4 - 51
  2. 52 - 61
  3. 62 - 81
  4. 83
  5. 84 - 86

Safari

  1. 3.1 - 9.1
  2. 10 - 13
  3. 13.1
  4. TP

Opera

  1. 9 - 38
  2. 39 - 51
  3. 52 - 67
  4. 68

iOS Safari

  1. 3.2 - 9.3
  2. 10 - 13.3
  3. 13.4

Opera Mini

  1. all

Android Browser

  1. 2.1 - 4.4.4
  2. 81

Blackberry Browser

  1. 7
  2. 10

Opera Mobile

  1. 10 - 12.1
  2. 46

Chrome for Android

  1. 81

Firefox for Android

  1. 68

IE Mobile

  1. 10
  2. 11

UC Browser for Android

  1. 12.12

Samsung Internet

  1. 4
  2. 5 - 7.4
  3. 8.2 - 10.1
  4. 11.1

QQ Browser

  1. 10.4

Baidu Browser

  1. 7.12

KaiOS Browser

  1. 2.5

Only supported in Android WebViews in apps that target Android Pie, due to this issue

Resources:
JS Bin testcase
Edge support request for rrggbbaa