I'm in the process of creating a website with the aid of plugins and
Use of !important
important! modifier is somewhat discouraged, but also, in most cases of prebuilt themes, the most appropriate way to override default settings. So, in your case, that's probably the only way you can override default color. Just use it if it works.
Also, I would write that rule as:
color: #012243 !important;
So, put a space between color code and