MaterialPropertyBlock.SetColor

public void SetColor(string name, Color value);

public void SetColor(int nameID, Color value);

Parameters

name	The name of the property.
nameID	The name ID of the property retrieved by Shader.PropertyToID.
value	The Color value to set.

Description

Set a color property.

Adds a property to the block. If a color property with the given name already exists, the old value is replaced.

#pragma strict
// Draws 3 meshes with the same material but with different colors.
public var mesh: Mesh;
public var material: Material;
private var block: MaterialPropertyBlock;
function Start() {
	block = new MaterialPropertyBlock();
}
function Update() {
	// red mesh
	block.SetColor("_Color", Color.red);
	Graphics.DrawMesh(mesh, new Vector3(0, 0, 0), Quaternion.identity, material, 0, null, 0, block);
	// green mesh
	block.SetColor("_Color", Color.green);
	Graphics.DrawMesh(mesh, new Vector3(5, 0, 0), Quaternion.identity, material, 0, null, 0, block);
	// blue mesh
	block.SetColor("_Color", Color.blue);
	Graphics.DrawMesh(mesh, new Vector3(-5, 0, 0), Quaternion.identity, material, 0, null, 0, block);
}

using UnityEngine;

// Draws 3 meshes with the same material but with different colors.
public class ExampleClass : MonoBehaviour
{
    public Mesh mesh;
    public Material material;
    private MaterialPropertyBlock block;

    void Start()
    {
        block = new MaterialPropertyBlock();
    }
    void Update()
    {
        // red mesh
        block.SetColor("_Color", Color.red);
        Graphics.DrawMesh(mesh, new Vector3(0, 0, 0), Quaternion.identity, material, 0, null, 0, block);

        // green mesh
        block.SetColor("_Color", Color.green);
        Graphics.DrawMesh(mesh, new Vector3(5, 0, 0), Quaternion.identity, material, 0, null, 0, block);

        // blue mesh
        block.SetColor("_Color", Color.blue);
        Graphics.DrawMesh(mesh, new Vector3(-5, 0, 0), Quaternion.identity, material, 0, null, 0, block);
    }
}

Function variant that takes nameID is faster. If you are changing properties with the same name repeatedly, use Shader.PropertyToID to get unique identifier for the name, and pass the identifier to SetColor.

#pragma strict
// Draws 3 meshes with the same material but with different colors.
public var mesh: Mesh;
public var material: Material;
private var block: MaterialPropertyBlock;
private var colorID: int;
function Start() {
	block = new MaterialPropertyBlock();
	colorID = Shader.PropertyToID("_Color");
}
function Update() {
	// red mesh
	block.SetColor(colorID, Color.red);
	Graphics.DrawMesh(mesh, new Vector3(0, 0, 0), Quaternion.identity, material, 0, null, 0, block);
	// green mesh
	block.SetColor(colorID, Color.green);
	Graphics.DrawMesh(mesh, new Vector3(5, 0, 0), Quaternion.identity, material, 0, null, 0, block);
	// blue mesh
	block.SetColor(colorID, Color.blue);
	Graphics.DrawMesh(mesh, new Vector3(-5, 0, 0), Quaternion.identity, material, 0, null, 0, block);
}

using UnityEngine;

// Draws 3 meshes with the same material but with different colors.
public class ExampleClass : MonoBehaviour
{
    public Mesh mesh;
    public Material material;
    private MaterialPropertyBlock block;
    private int colorID;

    void Start()
    {
        block = new MaterialPropertyBlock();
        colorID = Shader.PropertyToID("_Color");
    }
    
    void Update()
    {
        // red mesh
        block.SetColor(colorID, Color.red);
        Graphics.DrawMesh(mesh, new Vector3(0, 0, 0), Quaternion.identity, material, 0, null, 0, block);

        // green mesh
        block.SetColor(colorID, Color.green);
        Graphics.DrawMesh(mesh, new Vector3(5, 0, 0), Quaternion.identity, material, 0, null, 0, block);

        // blue mesh
        block.SetColor(colorID, Color.blue);
        Graphics.DrawMesh(mesh, new Vector3(-5, 0, 0), Quaternion.identity, material, 0, null, 0, block);
    }
}