In organic red stars with potassium chlorate as the main oxidizer and chlorine donor and strontium nitrate as the colour donor you usually have the same percentage of potassium chlorate and strontium nitrate, usually around 38% of each.
In the UK, Japan and other countries strontium nitrate is often not used, though, due to the high air humidity in those countries and the hygroscopic nature of strontium nitrate. Instead strontium carbonate is used, but then the potassium chlorate percentage must be almost the double while the carbonate must be less than half.