Is it safe to eat lamb that is slightly green?

No, it is not safe to eat lamb that is slightly green. The green colouration in lamb can indicate the presence of harmful bacteria such as Pseudomonas, which can cause food poisoning. It is generally advised to cook and consume lamb within two to three days of its purchase, and to store it at a temperature below 5 degree Celsius in order to preserve its freshness and prevent bacterial contamination. If you observe any abnormalities such as a green colouration in lamb, it is recommended to discard it for safety reasons.