I’ve just installed MainWP Dashboard 4.4.3 and am testing the colors of the tags. After editing a tag and adding a color, in the demo it shows that the colors are also visible as a 4px left border. In the Dark theme however, this CSS is loaded:
.mainwp-ui.mainwp-custom-theme .ui.pointing.vertical.menu .item {
border-color: var(--border-color) !important;
color: var(--font-color);
}
And because of that !important the tag color isn’t visible.