Since we don't have themes, the best we can do is set the color values for each element to something common. I created some text boxes. MasterFormat.BorderColor controls the overall color. The others are used with ColorFade().
An icon's enabled color is: ColorFade(MasterFormat.BorderColor,Value(MasterDarkIcon.Text))
Its disabled color: ColorFade(MasterFormat.BorderColor,Value(MasterLightIcon.Text))
This feature is on our roadmap but has been delayed. It is expected after October 2020.