Bug Description

Dark mode and custom theme colors cannot change the font color (only some areas change, while the main text remains unchanged).

Example:
As shown in the figure, in the dark mode of the default theme, the left side is abnormal. Only the font color of the preface part changes, while the main text remains black. The right side is the normal picture displayed when I use another book. The dark mode of the custom theme color is the same.
[screenshot]

Expected behavior

The font color can be changed normally

Technical inputs

Operating System:Android13(WebView 116.0.0.0)

Readest Version:0.9.67