Enter a skin as Weapon | Finish and its paint seed (0–1000) to get the exact Fade percentage and, for Case Hardened, the Blue Gem tier. The fade value is computed by formula and matches the game.
For Fade, Amber Fade and Acid Fade finishes the amount of gradient is fixed by the paint seed. A higher percentage means a fuller fade, which collectors pay more for. This calculator reproduces the Source-engine generator, so the number matches the in-game value exactly — no marketplace or inspect link needed.
Case Hardened skins show a mix of blue, gold and purple that depends on the paint seed. Seeds with the most blue on the play side are called Blue Gems and are the most valuable. Enter a Case Hardened skin with its seed to check whether it’s a curated top-tier pattern.
The paint seed (pattern index) is a number from 0 to 1000. You can read it with our Float Checker from an inspect link, or copy it from a marketplace listing that shows pattern/paint seed.