Headline Colour

Look in the customizer,see if there’s any color picker for headline, or you have do it with CSS

I had a look in the customiser. But the only colour i cannot change there seems to be the headline colour.

post your site address

https://koreanischlernen.net

Try adding this to your style.css file or in custom css(if you have any custom css section in customizer)

h1.site-title a {
    color: #FFF;

We recommend the following plugin:
https://www.ads-software.com/plugins/simple-custom-css/

This way, if you update your theme you will not lose the changes you’ve made to the CSS.

Thanks!