Small Calendar from Events manager in Sydney not yellow when eventful. But all is black!

Hello i have Event manager in Sydney, i have events on 20-9 but it is not shown in an other color as it should be ( td.eventful a rgb(253, 126, 41)) in the calendar Widget (Menu point: Concert Agenda)
When i switch to wordpress default theme twentyNineteen then the calendar works as it should.
Then the 20-9 is a different color! What can there be done to get the same results in the Sydney theme?
Until now i have build the site without changing code, all within wordpress i have not jet changed a css or PHP. When so please try to give me simpel instructions.

Down below when i switch to twenty nineteen
I can not post 2 images sorry~!

The 20,23,25,27 had to be the same color as the text Agenda-overzicht Oper Stuttgart
The site to look at is and then menu iten Concert Agenda
I hope someone can help me?


I can not post 2 images sorry~!

Can you please try to post it now?

Kind Regards, Roman.
aThemes Support


Hello, thank you for the second screenshot.

Try to use the following CSS code to change eventful items background (not the font color, to make them consistent with a gray today item). You can add CSS code in Customize → Additional CSS section.

table.em-calendar td.eventful {
    background-color: rgba(214, 80, 80, 0.3);

Please feel free to ask any other questions that you might have.

Kind Regards, Roman.
aThemes Support