Entire canvas is yellow after running an FPS script.

Hello, I've pulled an FPS counter script from ' http://wiki.unity3d.com/index.php?title=FramesPerSecond ' (I've slightly modified it for my use.)

Code (CSharp):

1. using UnityEngine;
2. using System.Collections;
3. using UnityEngine.UI;
4. public class HUDFPS : MonoBehaviour
5. {
6. public  float updateInterval = 0.5F;
7. private float accum   = 0;
8. private int   frames  = 0;
9. private float timeleft;
10.  
11. public Text guiText;
12. void Start()
13. {
14.     guiText = this.GetComponent<Text>();
15.     timeleft = updateInterval;
16. }
17. void Update()
18. {
19.     timeleft -= Time.deltaTime;
20.     accum += Time.timeScale/Time.deltaTime;
21.     ++frames;
22.     if( timeleft <= 0.0 )
23.     {
24.     float fps = accum/frames;
25.     string format = System.String.Format("{0:F2} FPS",fps);
26.     guiText.text = format;
27.     if(fps < 30)
28.         guiText.material.color = Color.yellow;
29.     else
30.         if(fps < 10)
31.             guiText.material.color = Color.red;
32.         else
33.             guiText.material.color = Color.green;
34.         timeleft = updateInterval;
35.         accum = 0.0F;
36.         frames = 0;
37.     }
38. }
39. }

Ever since I ran this script, everything on my canvas has a yellow tint. Anyone able to explain this, and give me a lead on out to fix it? Thankyou

Kind Regards, Lachlan

 

Use guiText.color = Color.yellow rather than setting it in the material?