Why is it called Green of envy?

You who are reading this may already know, but I will reveal my lack of knowledge in the history of religion. What I found out, I thought was interesting and hope you do too.

Envy is one of the seven deadly sins in Catholicism and was in the Middle Ages the most important guiding principle for the Ten Commandments.

Each deadly sin is represented by a color and an animal. Additionally, there was a basic penalty for each of the sins.

I do not know if it is the artist, painting the above or me who are color blind, but the explanations below does not fit the picture to 100 %.

Colors of the seven sins
Pride = Violet.
Greed = Yellow.
Lust = Blue.
Envy = Green.
Gluttony = Orange
Wrath = Red.
Laziness = Light Blue.
Animals of the seven sins
Pride = Horse, donkey and peacock.
Greed = crop.
Lust = Cow, bull, rooster or goat.
Envy = dog or goat.
Overeating = Pig.
Wrath = Bull.
Laziness = Goat or donkey


And the punishments? It is good that they do not apply today. Right?

Pride - break on the wheel (crush limbs)
Greed - to sit in a cauldron of boiling oil. (Fondue?)
Lust - to become smeared with fire and brimstone (where do you get sulfur?)
Envy - to sit in iced water
Gluttony - to eat rats, toads and snakes
Wrath - to be cut up alive
Laziness - to be thrown into a snake pit