This is a free Library with color palettes and swatches from the ColorBrewer set by Cynthia Brewer.
The color schemes are really good for displaying quantitative, ordered, and categorical data in an accessible way.
The palettes can be used in your web and app designs, or in data visualization environments such as D3, Plotly, and R.
Each swatch in the Library is available as a symbol to be masked with a graph shape.
Download the free Sketch file on sketchappsources.com