Plugin Contributor
Lap
(@lapzor)
If you use the Premium add-on of our plugin you can use the Style builder to set the button color. Custom CSS should of course work as well, as long as the theme’s CSS is not overwriting it. In worst case, you can use inline style in the form editor itself.
Using CSS code outside of our style builder is out of scope for our free support.
Hope that helps. If you have any questions, please let us know!