Choose a light end, a deeper end and a visual bridge between them. A palette can guide the look without implying that different formulas should be mixed.
Plan the transition
Place reference swatches in sequence and look for a sudden hue change. If the bridge looks muddy, try a closer colour family.
Consider a simpler alternative
Separate nails in related solid colours create a tonal progression without blending on the nail. Choose the application method supported by the products.