Wire cut bricks in dark colours

[ramankv]

Hi Everyone,
I am shopping for wire cut bricks and until now I have seen it one standard colour. I was told that the wire cut bricks come in dark colours such as dark brown and dark maroon and these come from Kerala. I enquired at shops that sell Kerala tiles and they said they don't have it. I am just curious if anyone in this forum knows about tthese dark coloured wire cut bricks and where we can find them?

Regards,
Raman.