When I saw the Library Blanket Joelle Hoverson designed for Purl Soho, I immediately fell in love. The marled combinations of oranges, pinks, blues, and purples were calling to me, so I ordered a kit right away. Other knitters commented that while they loved the pattern, the colors used weren't quite right for them.
As the varied blocks in the blanket are made by holding different pairs of yarns together, it can be difficult to imagine how a different yarn palette would knit up. To make it easier to visualize, I created a JavaScript and Canvas tool to render a digital mockup of the Library Blanket pattern in custom color palettes:
The tool will also generate the color combo list for the yarn names given, so you know which two yarns are held together in each block.
I've included a few preconstructed color palettes, including the one stated in the pattern, other combinations Purl Soho provided in the comments, and a few options I discovered while testing this tool. You can also create your own palettes either by selecting Purl Soho Line Weight or Linen Quill yarns from the dropdowns or by entering custom yarns in the text and color input fields. For each of the Purl Soho yarns in the dropdowns, I selected a hex color I felt corresponded well to the photo of that colorway. (Of course, a single color doesn't fully capture the subtleties in these yarns, and you may think a different hex color better matches a colorway than the one I chose! If you'd rather use a different hex color for a yarn, you can input it like you would for a custom yarn.) To preview this pattern with different yarns than the two Purl Soho specified in the pattern, you can enter your own yarn names and hex colors.
When you update any of the fields in the tool, the Library Blanket rendering and color combo list automatically update below.
P.S. I updated the colorways for Purl's Linen Quill and Line Weight yarns on September 16, 2021!