Icons in dark mode

[HectorSancho]

Goal

Improve A11y of icons and circle icons in dark mode.

Context

Some variants are not very accessible.

Impact

Improving user accessibility in these cases.

Discussion Questions

For now I think we should only improve the case of new O2 in the circle icon.

Additional considerations

No response

Do you have a visual proposal?

https://www.figma.com/design/qNRch2ojBcGXiMmMFUK0Dy/Asset?node-id=1096-18078&t=0J4KPlZrjxwraxyh-1

[HectorSancho]

The first step would be to change the inverse token to grey20 in dark mode.

Brand was so clear because of the avatar component, but with the new tokens I think we could change the brand colour to darkModeBeyondBlue.