Too many colors; increasing tolerance to {0} RGB2IND(RGB) is a deprecated syntax.\nSpecify number of colors, tolerance, or colormap. Invalid input arguments. RGB image has to be M-by-N-by-3 array. Colormap, Number of colors, or Tolerance have to be non-negative. Number of colors in the colormap has to be a non-negative integer. Input colormap has to be a 2D array with at least 2 rows and exactly 3 columns. All colormap intensities must be between 0 and 1. Unknown dither option: {0} Ambiguous dither option: {0} Dither option has to be a character vector.