ok i dont know if this is a shop suggestion or what i want like on the diamond tail item like have the diamond be 1 color EX: blue and 1 half another color EX: green instead of the preset customs i am sorry if i didnt word it right

Customization in general have a broad colouring, which would be most logical. You can't just colour half of a diamond. Also if we did, then we'd also need everything else changed so that it can be customized all over.