Red, yellow and green tokens are called procedural tokens, and are used to call procedural scenes your character is not in and determine how many cards you draw to resolve procedural scenes.
Blue tokens are recommended to represent drama tokens, an in-game currency encouraging players to strike a balance between rebuffing and granting petitions from other players.
The Hillfolk token set contains 6 red, 6 yellow, 6 green and 18 blue semi-precious stone tokens in a custom dice bag.
If you are live in the US or Canada, you can purchase the Hillfolk tokens here, while stocks last.
If you are live in the UK, EU or rest of the world, you can purchase the Hillfolk tokens here, while stocks last.