Hi Brien-
I couldn’t find your form 621, so I can’t double-check to be sure, but it does look like there’s a small typo in the CSS code you have there. You’ve got both the dot and hash symbols in your selector .#wpforms...
Here’s a rule I used that works on the form in your site’s footer:
#wpforms-form-23136 label {
color: #ffffff;
}
So this code takes the unique ID of the form itself, #wpforms-form-23136
and then selects every label
child-element. This code should work for your form ID 621 simply by swapping out the ID number. If you’re still having trouble using that, can you let us know which page form 621 is on so we can double-check for you?