We do not have this color, but we also used a silicate paint on lime-cement plaster. The first coat we diluted with about 7%, the second we applied undiluted. 10% was a bit too fluid, but that can vary from manufacturer to manufacturer. Really let it dry between coats, otherwise it won't work! Not like with dispersion paints where you can go over it again after an hour, but wait a day. Do not have too hot/dry air in the room and no drafts during application or the drying time. The paint needs time to cure and bond with the plaster and must dry slowly.
If you want other shades, only mix with the specified tinting colors or with alkali-resistant pigments (e.g., from Kreidezeit), all others will fade.