Failed unit tests in dark colorblind theme not very recognisable with protanomaly #428

Description

In the Dark Colorblind theme, the saturization / brightness for the green checkmark for passed unittests and for the red cross for failed unittests is very similar.

I have protanomaly and because of the aforementioned, it is more difficult than necessary to spot failed unittests when scrolling through a list of long unit tests.

Steps to reproduce

1. Have a number of unit test, of which most succeed and some fail
2. Open the unit test side bar in VS Code
3. Run the unittests

Version

v6.3.5

Theme

GitHub Dark Colorblind