[1.49.0] Warning message icon on light mode

[alfetopito]

Description

The warning displayed on light mode is barely visible.
Dark mode is fine.

Only noticed this on Safe, but it might happen on other situations

How to Reproduce

1. Connect with Safe as an app: https://swap-dev-git-release-1490-cowswap.vercel.app/
2. Turn the light mode on
3. Select the native token for sale
4. Once the order is ready, the safe bundling warning will be displayed

The warning can also be seen when selling a token for which there's no approval

Expected behavior

The warning icon should be visible

Screenshots

Additional context
Thread
Observed in the release PR #3342