Decal issue (color changed)

Hello. I’m making bullet decal.
I have 2 questions.

78625-이미지+034.png

this is my original decal image.
when I spawn decal to game scene, decal’s color change to color of target object.

78627-이미지+037.png

(before game start)
upper: white box
lower: ground

78628-이미지+038.png

(after game start)
getting more bright
I don’t know why whitebox became bright…
post process bloom was off.

this is decal’s material node

I want to show decal’s original color.
I want same color of 2 decals even if target surface is different.

sorry for my bad english. thank you