Wrong font color on sites/in blocks

Hi there,

I have a problem with the font color. In the customizer I have defined the font color for the text, this is also displayed correctly on the start page. However, on other pages, the text is black…

Black text is simply output in the blocks (Gutenberg). However, the color is not set on the page or block in the Gutenberg editor.

Please see: https://my-healthy-baby.de/ (correct)
and https://my-healthy-baby.de/ernahrungsberatung/ (wrong font color).

I’m using WP 5.9 and Astra 3.7.7.

Thx in advance.