How could the goblin blush

It's my most recently oekaki!!! (just finished it a miniute before)

A dark elf girl is kissing a goblin boy (aka my character, Goblin Inventor)
ahh, the dark elf looks like a monkey
hmm, if the goblins had green blood, how could they blush o_o?

I just love shi Painter =w=

edit : Thank you for sharing the comment about the goblin's blush ^^
Yes. It's should be dark green or blue. I had thought about it.
But it'll cross the human's common sense so I didn't make it green.
But the most important point is pale red blush is sweet