Tomato sauce sports a nice bright red color and a sweet taste that mimics that of the sweet paprika. However, these qualities alone without the spice are not enough as a swap. Mixing it with chili powder will add the heat that tomato sauce lacks. There’s a catch, however. Since this backup is wet, it’s only good for recipes like stews and soups.
The Scoville Heat Unit measures the heat factor chilies from different plants. Depending on the plant, its source and the brand, the SHU of Indian red chili powder ranges from 48,000 SHU (which is relatively mild) to 72,000 SHU (which is hot).