Error in srgb2lab for cform

cform = makecform('srgb2lab');

lab_he = applycform(I,cform);

ab = double(lab_he(:,:,2:3));

nrows = size(ab,1);

ncols = size(ab,2);

ab = reshape(ab,nrows*ncols,2);

nColors = 3;

[cluster_idx, cluster_center] = kmeans(ab,nColors,'distance','sqEuclidean', ...

'Replicates',k_val);

pixel_labels = reshape(cluster_idx,nrows,ncols);

segmented_images = cell(1,k_val);

rgb_label = repmat(pixel_labels,[1,1,3]);

for k = 1:nColors

colors = I;

colors(rgb_label ~= k) = 0;

segmented_images{k} = colors;

end

mean_cluster_value = mean(cluster_center,2);

[~, idx] = max(mean_cluster_value);

seg_img = segmented_images{idx};

I am getting error in this code as

Error using applycform (line 62)

Cform structure is invalid for Named Color.

Error in SegmentImage (line 11)

lab_he = applycform(I,cform);