Thank you Leo. No, customizing colors for the whole site won’t work because the rest of the site has a white background. The CSS works, thank you. I had to adjust so it would only affect the “photos” category (my dark theme):
.single.category-photos .comments-area input[type="submit"] {
background-color: inherit;
color: #FFF;
}
How do I adjust the hover colors? I tried adding a:hover or button:hover to the above code but I’m doing something wrong.