How can i change a drawn circle color and height position ?

Unity Engine
1 
using UnityEngine;
using System.Collections;

[RequireComponent(typeof(LineRenderer))]
public class DrawCircle : MonoBehaviour
{
    [Range(0, 50)]
    public int segments = 50;
    [Range(0, 5)]
    public float xradius = 5;
    [Range(0, 5)]
    public float yradius = 5;
    LineRenderer line;

    void Start()
    {
        line = gameObject.GetComponent<LineRenderer>();
        line.positionCount = segments + 1;
        line.useWorldSpace = false;
        CreatePoints();
    }

    void Update()
    {
        CreatePoints();
    }

    void CreatePoints()
    {
        float x;
        float y;
        float z;

        float angle = 20f;

        for (int i = 0; i < (segments + 1); i++)
        {
            x = Mathf.Sin(Mathf.Deg2Rad * angle) * xradius;
            z = Mathf.Cos(Mathf.Deg2Rad * angle) * yradius;

            line.SetPosition(i, new Vector3(x, 0, z));

            angle += (360f / segments + 1);
        }
    }
}

And i attached this script to a gameobject a cube.
The cube have a linerenderer component.

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In the Inspector on the right when i change the color from white to red for example it’s not changing the circle color. The circle color is pink by default. I can add a material but then it will make some other mixed color. If i add a red material the circle will be kind of brown.

Another problem is if i change the circle thickness in the Inspector moving down the red line the circle will looks like a bit above ground(terrain). Then i can move the cube a bit down but then the cube will be inside the terrain:

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Both problems: How to change the circle color ? And how to change the circle height position/to keep the circle height position to be always on ground.

2

The pink means it’s unrendered / no material. I haven’t used Line Renderer, but you can add the material “Sprites-Default”. Then you can change the color in the inspector.

I don’t think the material and the unrendered can mix. Maybe play around with the material properties or lightmap.

As for the height, perhaps you should just make a gameObject inside the cube and add the Line Renderer to that. That way you have more control over the height.