Sketch Best Practices: Colors
Definition | “Colors” in this case, mean any layer styles that solely contain a fill attribute (we do not recommend the pre-styles era method of using symbol masks for color fills)
Naming | align on a naming convention for color fill layer styles, that are easily translatable to how your developers will name the corresponding design tokens
Organization | create a dedicated artboard for your base colors in the Styles/Foundations (or similar) Library within your Design System
Application | use these generic color fill layer styles to style any layers or symbols that will always be tied to the base color palette