Here is the problem:

So since the background image doesn't switch with the theme, but the text in the header section does with change in theme, when one selects the theme as light, the text is rendered darker. Since the background is still the same, the text is not readable.
I see few possible solutions:
dark theme is selected the tint is dark and the text changes to white.Personal choice is point 1 above.
What do you think?
I think option1 is better.
I thought that I did implement it but it was not
I'll add the option titleColor in the header index file.
---
...
- type: img
...
titleColor: green
...
...
---
I uploaded!
...
- type: img
titleColor:
titleShadow: false
titleFontSize: 44
subtitleColor:
subtitleCursive: false
subtitleFontSize: 16
spaceBetweenTitleSubtitle: 20
...
New params: titleShadow titleColor subtitleColor subtitleCursive
Although it fixed this issue, but now the whole blog is not responsive. I opened other issue #80 where there was a white bar at the right side and the header was not responsive. After your change, now the whole blog is not responsive :thinking:

Ok, I'll find out what's going on
This is also fixed.
Thank you :tada: