BLACK TO RED MUTATIONS (UNIDENTIFIED GENE)
(See also: Blue-on-Red Tabbies & Pseudo-Cinnamon)
Ilka Antippa has this colouring in her Lynx (Tabby) Seal Point Bengal. He is genetically not red, amber or cinnamon. He is also not silver. The colour resembles sunshine or extreme wide-banding where the tipping has been pushed off of the tips. His parents were brown spotted Bengals carrying colourpoint, but with no silver in either line. Sorrel Bengals were present in both parent's lines and are linked to the counter-shading trait (pale or white bellies). Their breeder had selected for rufism, warm browns and soft coat texture, a set of traits that may also have led to the unusual colouring.
One thought is a Corin gene mutation. A Corin mutation causes "sunshine" in Siberians and a Corin mutation also causes golden tabby tigers. Another thought is the unidentified pseudo-cinnamon mutation, seen in several random-bred cats and in 2021 in a Maine Coon line (Doma Yahontoff Maine Coons, Natalia Yakhontova).