Hi - I'm about to take the plunge into trying to cover the grey at home, and want to try out Daniel Field watercolours. But - they don't publish the colour chart on their website and I also am feeling nervous about going too dark - I'd say my hair is normally sort of a light ash brown/dark blonde, and I'm doing this to cover a bunch of grey streaks but really don't want to go darker overall as I'm afraid I'll look too washed out (too pale skin). Does anyone use this product and have any advice to share? thanks!