Too many output arguments help

I created a function I am trying to call,

MwC = ColorID(MwC);

This is MwC

MwC =
   229   250   246
   252   116    13
     0   255   109
     0     6   217
   235   255   254
   254     0     0
   254     0     0
   254     0     0
   254   254    43

Here is my function called ColorID

function ColorID(~)
ColorIdent = zeros(9,3);
for w = 1: size(ColorIdent,1)
    
if [(ColorIdent(w,1) <= 255),(ColorIdent(w,2) <= 20),(ColorIdent(w,3) <= 20)] %Red limits
     ColorIdent(w,:) = [1 0 0]; %Red
   
elseif [(ColorIdent(w,1) >= 240),((ColorIdent(w,2) >= 50) && (ColorIdent(w,2) <= 146)),(ColorIdent(w,3) <= 100)] %Orange limits
     ColorIdent(w,:) = [1 0 1]; %Orange but had to use magenta
     
elseif [(ColorIdent(w,1) <= 20),(ColorIdent(w,2) <= 20),(ColorIdent(w,3) <= 255)&&(ColorIdent(w,3) >= 0)] %Blue limits
     ColorIdent(w,:) = [0 0 1]; %Blue
     
elseif [(ColorIdent(w,1) <= 46),(ColorIdent(w,2) >= 200),(ColorIdent(w,3) <= 150)&&(ColorIdent(w,3) >= 80)] %Green limits
     ColorIdent(w,:) = [0 1 0]; %Green
    
elseif [(ColorIdent(w,1) >= 190),(ColorIdent(w,2) >= 229),(ColorIdent(w,3) >= 233)] %White limits
     ColorIdent(w,:) = [1 1 1]; %White
    
elseif [(ColorIdent(w,1) >= 215),(ColorIdent(w,2) >= 230),(ColorIdent(w,3) <= 140)] %Yellow limits
     ColorIdent(w,:) = [1 1 0]; %Yellow
   
end
end
end

Could someone please help me and explain why the error is happening?

Answer 1

[Matt J]

Your function needs to be told what to return, e.g.,

function ColorIdent = ColorID(~)