Check themes colors with the design palette

There may be some inconsistency between design in [Figma](https://www.figma.com/file/X4XTH9iS2KGJ2wFKDqkyed/Compound?node-id=557%3A0) and implementation.
We need to synchronise them again.

There are 2 actions:
- [ ] Make sure the design palette is up-to-date. This is a design team action.
- [ ] Implement right colors in our themes

Start by reviewing the linked Figma Compound design palette and locating the iOS theme color definitions. Compare the implemented theme colors with the approved palette, accounting for the design team's palette update first. Done means the themes use the synchronized colors and the remaining checklist items are complete.

Written by the indexing model from the issue text.