How to generate a random color?

Questions & Answers
,
1

I tried to generate a random color like this:

Color background = new Color(
    (float)Random.Range(0, 255), 
    (float)Random.Range(0, 255), 
    (float)Random.Range(0, 255)
);

But I always get white as result.

What am I doing wrong?

5

UnityEngine.Random.ColorHSV() generate Random color

4

As suggested by Dragate, the Color struct needs values between 0 and 1, as indicated in the documentation

Representation of RGBA colors.

This structure is used throughout Unity to pass colors around. Each color component is a floating point value with a range from 0 to 1.

In order to use values between 0 and 255, you need the Color32 class :

 Color32 background = new Color32(
     Random.Range(0, 255), 
     Random.Range(0, 255), 
     Random.Range(0, 255),
     255
 );

// Color version

 Color background = new Color(
     Random.Range(0f, 1f), 
     Random.Range(0f, 1f), 
     Random.Range(0f, 1f)
 );
6

This is the simplest:

// Pick a random, saturated and not-too-dark color
Color color = Random.ColorHSV(0f, 1f, 1f, 1f, 0.5f, 1f);
3 
Color background = new Color(
     Random.Range(0f, 1f), 
     Random.Range(0f, 1f), 
     Random.Range(0f, 1f)
 );
1 Like
2

Maybe try this:

string seed = Time.time.ToString ();
System.Random random = new System.Random (seed.GetHashCode ());
Color background = new Color(
    (float)random.Next(0, 255), 
    (float)random.Next(0, 255), 
    (float)random.Next(0, 255)
);
7

Sweet AmmarSalim…i just needed to specify the renderer when attached to my gameObject. But yeh your code worked. Big up ! Thanks

obj.GetComponent.material.color = Random.ColorHSV(0f, 1f, 1f, 1f, 0.5f, 1f);
8

Sweet AmmarSalim…i just needed to specify the renderer when attached to my gameObject. But yeh your code worked. Big up ! Thanks

obj.GetComponent().material.color = Random.ColorHSV(0f, 1f, 1f, 1f, 0.5f, 1f);

9 
public Color32 RandomColorGenerator()
{
   byte r = (byte)Random.Range(0, 255);
   byte b = (byte)Random.Range(0, 255);
   byte g = (byte)Random.Range(0, 255);
   Color32 color = new Color32(r,b,g,255);
   return color; 
}