The most recent filter I have tested from the super cheap filter kit was the green filter. The green filter is the last of what I would consider the standard black and white photography filters that I tested.
What does a green filter do? According to hoyafilterusa.com:
Less popular than the other colors but still very useful for specific types of photography. The Green filter is good for lightening the tone of green foliage which can give an other-worldly effect similar, but not has strong as infrared in some situations. Since it renders greens lighter it can be used in the scenic photography but because it also makes skies a lighter gray care should be taken to consider the scene and include as little sky as possible.
Here are a few examples taken in my backyard:
I’m not sure which filter I will test next, but I’m thinking it might be pink.