Masonic Theme – Search Bar/Box – Change color of text

I’m a rookie wordpress user. My blog uses the masonic theme. I’ve enabled the search bar and it works OK. The issuem I am having is that the text that is typed into the search bar is a dark gray and it’s tough to read against the background of the search box (it’s actually readable after the search button is clicked). I’ve done some research, and while I found some additional CSS code that is supposed to fix this problem, it doesn’t work on my site. Wondering if anyone knows how I can customize the color of the text in that search box?

This is a duplicate entry, I didn’t see the request for more info the last time and that post is locked. The URL for my blog is https://markjsheffield.com/blog/

Thanks

Sheffield

p.s. This is the code I tried that was supposed to help.

.header .search-bar .search-input {
background-color: white;
}

.header .search-bar .search-icon {
color: white;
}

The page I need help with: [log in to see the link]