Setpixels creates gradient texture instead of raw colored pixels

Hi!

I'm using Texture2D's setPixels() method to generate a texture. I want to turn my data like:

 000000002222211
 112222200011221
 ...

to an image like this

However my result looks like this (I've added a black frame to make it more visible):

I think it must be some kind of shader thing I have to change, it looks like when you say in openGL (it's just a pseudo something):

 var topLeft  = vec2(0, 0)
 var topRight = vec2(0, 1)
 var botLeft  = vec2(1, 0)
 var botRight = vec2(1, 1)
 
 var p = Primitive.Quad(topLeft, topRight, botLeft, botRight)
 
 p.setColors(Color.brown, Color.bown Color.white, Color.white)

Here's my Unity Code for generating the texture:

 using UnityEngine;
 using System.Collections;
 
 public class MiniMap : MonoBehaviour {
     public static int WHITE         = 0;
     public static int BROWN         = 1;
     public static int DEEP_BROWN    = 2;
 
     public SpriteRenderer myRenderer;
     public Map map;
 
     Texture2D texture;
     Sprite sp;
 
     Color c_WHITE       = Color.white;
     Color c_BROWN       = new Color(204, 139, 0);
     Color c_DEEP_BROWN  = new Color(148, 101, 0);
 
     void Start() {
         texture = new Texture2D(30, 15);
     }
 
     void Update() {
         int[][] minimapInfo = map.getMinimapInfo(0);
         Color[] pixels = new Color[30*15];
 
         Color color = Color.red;
         for(int i = 0; i < 30; ++i) {
             for(int j = 0; j < 15; ++j) {
                 if(WHITE == minimapInfo[i][j]) {
                     pixels[i*15 +j] = c_WHITE;
                 }
                 else if(BROWN == minimapInfo[i][j]) {
                     pixels[i*15 + j] = c_BROWN;
                 }
                 else if(DEEP_BROWN == minimapInfo[i][j]) {
                     pixels[i*15 + j] = c_DEEP_BROWN;
                 }
 
             }
         }
 
         texture.SetPixels(pixels, 0);
 
         // Apply all SetPixel calls
         texture.Apply();
         sp = Sprite.Create(texture, new Rect(0, 0, 0.5f, 1f), new Vector2(0.0f, 0.0f), 0.1f);
         myRenderer.sprite = sp;
     }
 }