Hi Orrii,
I am not from support, I am a customer just like u, thought could be of help. To change the color of the button you can go to color customiser, which can be found either from Theme options or the admin bar above.
Once in color customiser dashboard look for Color-Accent, click on the drop down, In the option which says Secondary Accent color change it to any color of your liking, also you can change the Secondary Accent Alt color ( i keep it white as a contrast to the blue for the secondary accent I choose for myself ). This I think will change the button color.
For Text, Go down in the dashboard, You will find an option Color-Body, click on the dropdown, you will find body text color and other options, change them to suite your style.
Hope this helps.
Regards
Celeste