Very , very lovely were the reds and yellows and browns against the dark green of the pines and the spruces and the hemlocks .<br>The Purple Hills were more softly purple than at any other season of the year .<br>It was all very , very beautiful .<br>But Peter had no thought for the beauty of it all , for the Spirit of Fear had visited even the dear Old Briar-patch , and Peter was afraid .
The color pink is mentioned over and over again through this excerpt. 
The colors that were mentioned include red, yellow, brown, green, and purple - therefore, my statement is definitely incorrect, because the color pink is not among this list. I think the system had difficulty because it cannot tell the difference between colors or know what they even are to begin with. 
( z1 mention :ARG1 ( z2 color :mod ( z3 pink ) ) :frequency ( z4 over-and-over ) :medium ( z5 excerpt :mod ( z6 this ) ) )