My DS bombed that part of the test as well when he did it at age 6.5. I'm not entirely sure which part it ties into but his processing speed ended up being 9th %tile. His VCI and PRI were still gifted and they just did a GAI instead of FSIQ. In general his scores were all over the place (even a couple of the subtests within the VCI/PRI) and we will eventually have to retest to get a better picture but it was good enough for what we needed at the time.
For colours DS's answer was "rainbow, done, easy.". The tester then tried again and he reluctantly said "rainbow, gold, silver, bronze, platinum" and maybe a couple others. For animals he mostly used obscure ones (short faced bear, honey badger, echidna, mageladon come to mind). I was sitting in the corner trying not to laugh or cry because we were spending all this money to find out he was a goof
It was all I could do to not shout "what about red, yellow, blue" or "cat, dog, tiger". The tester had a good laugh at the rainbow one.
ETA - watching his testing I was sure he wouldn't score high. He answered questions while hiding under the desk, jumping up and down, throwing and catching a pencil, etc. I walked out of the second session thinking I'd be happy with 100. I was a bit shocked when he scored as well as he did. I'm also pretty curious to see what he could do if he was completely cooperative. Maybe the test managed to see through all of it and it won't be much different, or maybe he will score crazy high. Who knows.
Good luck!
