Brand new lesion; referral to dermatologist

I just got referred to a dermatologist for a brand new lesion I discovered Monday, something which I have never seen the likes of before on my skin. When I first saw it, I first thought a piece of chocolate had fallen on my skin, but when I went to wipe it off, I discovered it was actually part of my skin!

Already I was concerned and took this close-up photograph of it (it's about 3 mm/0.125 inch long ways, so it's not that big yet):

Then Wednesday, I took this picture, and you can see skin returning to normal in the bottom portion:

And then Thursday, a huge chunk of the bottom portion is gone, but there seem to be greenish-yellowish raised areas developing in the lesion:

And Friday the bottom portion is completely gone, but you can see the raised areas clearly, which are greenish/yellowish (picture taken in evening sun):

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I went to my primary care doctor today, and they referred me to a dermatologist.

The one thing I have a question about, though, is that melanoma often has a blue-white veil, which as I understand represents where the skin is getting thicker (where the lesion is growing vertically), but where the lesion grows vertically for me it's green-yellow instead. Also, green is not listed as one of the colors melanoma can have in the sources I have red. So where does this green come from?