From now on, you can switch dark and light theme. We had two UX/UI designers (from our test group), who have looked at the options. First we aimed at simply white for light, but this was shot down, especially as the dark mode isn't fully black (high contrast).
A mostly 'conservative' icon has been added to switch. The choice is application wide, so you can't select per project (We were in the process, but that is having a lot of issues. Perhaps in the future).
Dark mode has been adjusted only slightly (to accomodate buttons etc.
Lightmode is a softer mellow light version. All contrast has been checked and where it is lower than acceptable for accessibility we have decided to leave it as is for now.
If you are visually impaired and can't use the light mode, please let us know, so we can adjust the contrast ratios on the screens.