If you're talking about the NBC Heads Up Tournaments, I remember those chips. At least from the year(s) the tournament was held at Caesars Palace, (I don't recall if they had it at another venue/casino or not). They used spotted Paulson hotstamps. And I think I found the exact chips on the Chipguide -- listed under NCV (no cash value):
I remember seeing these color spots and chips:
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There are also higher value chips on the Chipguide, but I don't recall if they used these in the Heads Up matches or not. (they may not have even used these values for the starting chip stacks, maybe at the final 2, if they chip values
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