Works like a charm! Thanks Peter!
for the record I used
.notblack .nx-basicfieldeditor-item-label[style="color: rgb(0, 0, 0);"] { <br /> color:#54698d !important;
so that I could add the notblack css to just the two fields I wanted, in case this changed things I didn’t want changed, especially because I’m using this field in a page include.