My guess would be that it doesn't see the web colors (CSS color hexes) as proper hex triplets, but because of tokenization it could be something dumb like '#8B','451','3' instead. I think the same issue happens around multiple special characters after each other too.
No, it's understanding the colors properly. The SVG that the LLM created does use #4169E1 for the pelican color, and the LLM correctly describes this color as blue. The problem is that pelicans should not be blue.
