Text in the about us page is not visible

**Describe the bug**
The text in the about page is not clearly visible in the dark mode.

**To Reproduce**
Steps to reproduce the behavior:
1. Go to the website
2. Scroll down to 'About us'
4. See error

**Expected behavior**
In the night mode the text is not visible.
**Screenshots**

**Desktop (please complete the following information):**
- OS: windows
- Browser chrome
- Version

**Smartphone (please complete the following information):**
- Device: [e.g. iPhone6]
- OS: [e.g. iOS8.1]
- Browser [e.g. stock browser, safari]
- Version [e.g. 22]

**Additional context**
Add any other context about the problem here.