The type `Color' does not contain a constructor that takes `3' arguments

Unity Engine
1

I recently downloaded MaterialUI for free online from GitHub. When I tried to use it, it gave me several errors. They all say:

The type Color' does not contain a constructor that takes 3’ arguments

One line of code where an error is coming from is this:

m_RGBImage.color = new Color(m_sliderR.value/255f, m_sliderG.value/255f, m_sliderB.value/255f);

I am running Unity 5.3.4f1 Personal Edition. Could anyone help me solve this issue?

2

Have you tried adding an alpha value

3

That should work. Is it possible you have another class named “Color” in your project that’s hiding the Unity class?

4

Well, this is what the whole script looks like:

using UnityEngine;
using UnityEngine.UI;
using MaterialUI;

public class Example05 : MonoBehaviour
{
 #region groupRGB
 [SerializeField] private Text m_sliderTextR;
 [SerializeField] private Text m_sliderTextG;
 [SerializeField] private Text m_sliderTextB;
 [SerializeField] private Slider m_sliderR;
 [SerializeField] private Slider m_sliderG;
 [SerializeField] private Slider m_sliderB;
 [SerializeField] private Image m_RGBImage;

 void Awake()
 {
 onSliderRValueChanged();
 onSliderGValueChanged();
 onSliderBValueChanged();
 }

 public void onSliderRValueChanged()
 {
 m_sliderTextR.text = m_sliderR.value.ToString();
 updateRGBImage();
 }
 
 public void onSliderGValueChanged()
 {
 m_sliderTextG.text = m_sliderG.value.ToString();
 updateRGBImage();
 }

 public void onSliderBValueChanged()
 {
 m_sliderTextB.text = m_sliderB.value.ToString();
 updateRGBImage();
 }

 private void updateRGBImage()
 {
 m_RGBImage.color = new Color(m_sliderR.value/255f, m_sliderG.value/255f, m_sliderB.value/255f);
 }
 #endregion
}
5

This.

The docs list a three parameter constructor for the Color class.

Do a search of the entire project. Is there another class called Color?

6

I’m pretty sure no… Here is a photo of me searching for “Color” (Attached Below)

2662865--187785--Screen Shot 2016-06-03 at 11.08.28 AM.png

7

What is in “Color.cs”? You sure it’s not a MonoBehaviour named “Color”?

2 Likes
8

Try adding this to the top of your file:

using Color = UnityEngine.Color;

That will make sure Color resolves to the version in UnityEngine. My guess is the same as others… the problem is that someone created a Color class and didn’t put it in a namespace, which means it goes in the Global namespace and ruins everyone’s day.

9

Okay… I did that. I got this error now:

Assets/MaterialUI/Examples/Scripts/05 - Sliders/Example05.cs(44,40): error CS0576: Namespace global::' contains a definition with same name as alias Color’

10

That means there is definitely another class named “Color” in your project. Like I mentioned, “Color.cs” is probably a good guess for where it is.

2 Likes
11

Okay, that all worked… Thanks!