Mobile First, Scss, Vanilla Js, simple form validation

Hi! I really struggled with svg images in this challenge and wasn't able to change the color to what it was in the design - change of fill on svg path didn't work, even when manually changed in the code. I think it's because of the color matrix in the file, but I couldn't find anything helpful in my search - either because I didn't find the right way to describe the problem or because I'm overcomplicating it :)

Either way, I'd be really grateful for any help on that :)