There will be a slight color variance between the digital proof and actual printed product.
This is because any digital proof is rendered in RGB colors (as projected on the screen of your device) and your actual printed product will go through color processing.
Off-set printing for one or two color noissue tissue designs use the Pantone Matching System. Digital printing for noissue stickers, tape, custom mailers, and 3 or more color tissue designs use the CMYK color process.
Feel free to get in touch with the team here to discuss or check out our blog post on color here.