@Borgiz I assume you are using the Built-In Render Pipeline, right? In general please always describe your project setup such as the spine-unity version (name of the unitypackage), render pipeline, and similar when asking on the forum.
The "Spine/Sprite/Vertex Lit" shader provides a color parameter next to the Albedo texture parameter which acts as a tint color multiplier.
There is also a Color Adjustment parameter, when enabled you can set the Overlay Color parameter immediately below it. The Overlay Color alpha value determines the blend intensity of the Overlay Color (0=no color overlay, 1=full color overlay).
If this is not what you want, please describe your problem in more detail.
