Short answer: It varies by tradition and local practice. In Nav Ang Puja, some communities do use kesar (saffron) paste as a tilak along with chandan, while others prefer chandan alone and avoid saffron. Digambar and Shwetambar traditions may differ in exact use and acceptance, but the core aim remains non-violence, purity, and devotion.

What to keep in mind:

• Kesar is sometimes included as part of the tilak for Nav Ang Puja, often together with sandalwood paste (chandan).
• Others prefer only chandan and may minimize or avoid kesar, especially for reasons of ahimsa and murti protection.
• If you attend a temple or follow a specific guru's guidance, follow that local practice.

You can read more here and see related Nav Ang Puja details