Another bug-report:
I made my own colors.css, just search-and-replace '#1ABC9C' to 'var(--main-color)' in color.css supplied with theme.
Then I defined color in main template like this:
:root {
--main-color:green;
}
Alsmost all color was changed to assigned new one, but if you will make your header transparent (by adding 'transparent-header' class to it) - dropdown submenus will render in unchanged (#1ABC9C) color: https://prnt.sc/12ty1zp
