Description:
The LO dark scheme is not taken into account properly in the following cases:

1) Text boxes: 
Text color in text boxes becomes dark when the cursor is clicked inside the text box or while typing, which makes the text almost illegible over the black background. Happens E.g. in LO Writer or LO Impress with text BOXES.

2) Slide show
In slide show, the background color of the current slide switches to white background.

Steps to Reproduce:
1. LibreOffice preferences > Application colors > Scheme > LibreOffice Dark
2. Open a new presentation in LibreOffice
3. Write something in the title box

4a. Don't click outside the text box after having written
4b. Slide Show > Start from first slide

Actual Results:
4a. It change the white text color to dark grey which is very difficult to read

4b. In slide show mode, the dark background switches to white, so all your white text are illegible.

Expected Results:
4a. Text should remain with a light color to be readable with a dark background

4b. The background should remain black


Reproducible: Always


User Profile Reset: No



Additional Info:
Tested on macOS 10.15.7 on both LO Writer (text boxes) and LO Impress (text boxes and slide show).

Version: 7.3.1.3 / LibreOffice Community
Build ID: a69ca51ded25f3eefd52d7bf9a5fad8c90b87951
CPU threads: 8; OS: Mac OS X 10.15.7; UI render: default; VCL: osx
Locale: en-GB (en_FR.UTF-8); UI: en-US
Calc: threaded