SpriteColourChanger Companion Script

using UnityEngine;

[ExecuteInEditMode]
public class SpriteColourChanger : MonoBehaviour
{
    public enum ColourMode {
        Mode3,
        Mode6
    }
    public ColourMode mode = ColourMode.Mode6;
    public Color R = Color.red, G = Color.green, B = Color.blue, C = Color.cyan, M = Color.magenta, Y = Color.yellow;
    public Renderer Renderer => (mRenderer == null) ? mRenderer = GetComponent<Renderer>() : mRenderer;
    private Renderer mRenderer;
    private void Awake()
    {
        UpdateColours();
    }
    [ContextMenu("Update Colours")]
    public void UpdateColours()
    {
        MaterialPropertyBlock materialBlock = new MaterialPropertyBlock();

        Renderer.GetPropertyBlock(materialBlock);
        materialBlock.SetColor("_R", R);
        materialBlock.SetColor("_G", G);
        materialBlock.SetColor("_B", B);
        materialBlock.SetColor("_C", mode == ColourMode.Mode6 ? C : B);
        materialBlock.SetColor("_M", mode == ColourMode.Mode6 ? M : G);
        materialBlock.SetColor("_Y", mode == ColourMode.Mode6 ? Y : R);
        Renderer.SetPropertyBlock(materialBlock);
    }

    void Update()
    {
        if(!Application.isPlaying)
        {
            UpdateColours();
        }
    }
}