Texture Not Showing On Mesh

I have a problem in Unity where the mesh is appearing completely black. This is the C# code to set the texture:

 public void GenerateMap()
 {
     float[,] noiseMap = GenerateMapData();
     Texture2D colorMap = TextureGenerator.GenerateColorMap(noiseMap, mapWidth, mapHeight);
 
     Mesh mesh = new Mesh();
 
     mesh = MeshGenerator.GenerateMesh(noiseMap, mapHeight, mapWidth);
     meshFilter.sharedMesh = mesh;
 
     meshRenderer.sharedMaterial.mainTexture = colorMap;
     meshRenderer.transform.localScale = new Vector3(colorMap.width, 1, colorMap.height);
 }

Generating the mesh is fine, but the texture is not appearing. The material applied to the mesh is a standard material called 'Mesh' with smoothness set to zero. Overall project is a Perlin noise terrain generator. colorMap is correct as I can apply it to a plane with:

 textureRender.sharedMaterial.mainTexture = colorMap;
 textureRender.transform.localScale = new Vector3(colorMap.width, 1, colorMap.height);

Any help would be appreciated.

And no, I didn't forget the uvs:

 uvs[currentVertex] = new Vector2(x / width, z / height);
 
 Mesh mesh = new Mesh
     {
         vertices = vertices,
         triangles = triangles,
         uv = uvs
     };
 
     mesh.RecalculateNormals();