Most likely! Our Art Department is usually able to adjust colors in an art file depending on the complexity.
We do ask for specific CMYK values for the color you would like to have added to your sticker if it is not black or white. This is to ensure that we provide the correct color on your proof.
Please let us know if you are not familiar with CMYK or if you have any other details on how we can help you achieve the desired color for your sticker or label!
More on CMYK here!