Corresponding to these three ‘bindings’, there are three colours: a fire of black, white, and blue. Whoever preserves the candle of Ha-Shem (Prov. 20:27) – the soul of a person, in Torah, in positive and negative precepts – the fire of hell has no control over him.
And this is: liver, and gall bladder and spleen. The liver is red fire, the gall bladder is green fire, the spleen is black fire, the extra lobe of the liver includes them all, dark blue. And the colour blue (te-khelet) of the tzitzit is a precept, and there is no tekhelet (blue) in ‘the other side’, because it that particular blue is similar to the throne of glory.xxxixBT Sotah 17a