ML digital ISO is a sneaky dangerous setting and should be indicated, I suggest pink as that's what it does to the highlights.
eg.: in the given example ISO100 - 0.5EV, hence it turns pink.
Or perhaps only ISO could turn pink, so when we set ISO3200 - 2ev, "ISO" would turn pink and "800" would be amber, a beautiful colour palette to remind user of pink and noisy results they shall receive with such settings.
eww.. indeed it does look ugly as hell, but if anything, I believe you will agree it's simply wrong to have ISO3200-2EV represented casually as ISO800 in white..