Access the particle system color over lifetime module.
using UnityEngine; using System.Collections;
public class ExampleClass : MonoBehaviour { void Start() { ParticleSystem ps = GetComponent<ParticleSystem>(); var col = ps.colorOverLifetime; col.enabled = true;
Gradient grad = new Gradient(); grad.SetKeys( new GradientColorKey[] { new GradientColorKey(Color.blue, 0.0f), new GradientColorKey(Color.red, 1.0f) }, new GradientAlphaKey[] { new GradientAlphaKey(1.0f, 0.0f), new GradientAlphaKey(0.0f, 1.0f) } );
col.color = new ParticleSystem.MinMaxGradient(grad); } }