Hey Developers!
I’m not really sure if this is a Building issue or not so I do apologise if this is the wrong category.
Basically my issue is I’m making a drink system and the properties of the part is pink but the tool is displaying it as brown. I’ll show you bellow what I mean.
As you can see from the image above it’s set as pink on the properties but is brown in the game.
I’m very confused and any help would be appreciated. 
Try using the UsePartColor property for the union.
If all else fails, use textures. Other than that 
It being inside a tool is not the issue. The issue is how Union instances display color.
When you union two parts with different colors, the result will have those two colors on it, for example this union
I haven’t got a clue how these colors are actually stored, probably as vertex colors but that’s not important.
If you want to change an unions color, you have to go to the union instances properties, and under Data set UsePartColor to true
With that set to true, whatever color values the union operation stored will be ignored and it’s Color3 value will be used instead
So, just as @Crazedbrick1 said, just set UsePartColor to true.
Thanks so much for your help!
