Problem comparing Pixel value of RGB 'single' Image

There is a problem comparing the RGB pixel value e.g (300,300,:) of an RGB 'single' image with any fixed scalar value. Here is the example for trying out yourself using demo image:

      ii = imread('fabric.png');
      ss = im2single(ii);
      mm = ss(300,300,:);
      nn = mm(:)
      nn(2) == 0.2235

Here it return 0 (false).

On the other hand:

    nn = [0.3098; 0.2235; 0.2706]
    nn(2) == 0.2235

It return 1 (true), as expected.

Kindly shed some light on this issue. I am using MATLAB R2014b. Thanks