I don't have reliable information about a specific artwork titled "Pansies in a Basket" by Sam McKinniss in my training data. While Sam McKinniss is a contemporary artist known for detailed figurative and still life work, I cannot verify the details of this particular piece or confirm it was created in colored pencil on paper without risking inaccuracy. If you have access to the artwork or exhibition information, I'd be happy to help you write a description based on what you observe or know about it.