I can’t find a paid version of GenerateBlocks so I hope it’s okay to ask a support question related to GenerateBlocks here.
It’s the “headline” block which in the back-end is set to be center aligned and have the color 953e44 (and everything looks like it should there). But in the front-end it’s left aligned in black.
I’ve just a default Gutenberg Heading block right above it – and that will center align and change color without any issue. So it seems be related to the headline block in Generateblocks.
See it on the page linked below. The first headline “Alle type juridiske problemstillinger innen agentur og franchise” is with Gutenberg Heading – and the one right under it (same text) is with GenerateBlocks.