Random.value

Description

Returns a random number between 0.0 [inclusive] and 1.0 [inclusive] (Read Only).

Both 0.0 and 1.0 may be returned by this property. This behaviour is different to that of many other random number generators which return a value less than but never exactly equal to 1.0.

// Generate a random color value.
function RandomColor() {
	// A different random value is used for each color component (if
	// the same is used for R, G and B, a shade of grey is produced).
	return new Color(Random.value, Random.value, Random.value);
}

using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour {
    Color RandomColor() {
        return new Color(Random.value, Random.value, Random.value);
    }
}