How to generate a random color?

Question

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?

Answer 1

Best Answer

Answer by Hellium · Oct 28, 2017 at 09:10 PM

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)
  );

10 · Share

Answer 2

Answer by RazaTech · Feb 17, 2019 at 05:28 PM

UnityEngine.Random.ColorHSV() generate Random color

12 · Share

Answer 3

Answer by AmmarSalim · Oct 22, 2020 at 08:55 AM

This is the simplest: { // Pick a random, saturated and not-too-dark color GetComponent().material.color = Random.ColorHSV(0f, 1f, 1f, 1f, 0.5f, 1f); }

4 Show 2 · Share

DJ-Antony · Jan 11, 2021 at 09:38 AM 0

Share

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);

SlowSeer · Dec 15, 2022 at 03:00 PM 0

Share

This gives some nice looking colors. Feel like it has a bit of a bias towards green but who knows.

Answer 4

Answer by Dragate · Oct 28, 2017 at 06:20 PM

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

3 · Share

Answer 5

Answer by krokots · Oct 28, 2017 at 05:55 PM

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)
 );

0 Show 1 · Share

MagicStyle · Oct 28, 2017 at 10:49 PM 0

Share

I get only white back, exactly like on my code

How to generate a random color?

5 Replies

Your answer

Welcome to Unity Answers

Follow this Question

Related Questions