Common mistakes include pairing Alabaster walls with cold, stark whites for trim that amplify yellow undertones and clash harshly. Another error is ignoring the effect of lighting conditions and wood flooring, both of which influence how colors read. Not testing trim color samples under your actual lights and alongside your floors before painting can lead to disappointing results. To avoid these errors, opt for trims in Alabaster itself or soft neutrals with similar warmth, always testing samples carefully to ensure harmony.