Modifiers matching shade:

• metallic,
• abnormal,
• light,
• neutral,
• soft,
• unnatural,
• diverse,
• dense,
• artificial,
• pastel,
• bright,
• pale,
• red,
• vibrant,
• portable,
• temporary,
• dark,
• protective,
• cool,
• darker,
• basic,
• lighter,
• unusual,
• unwanted,
• warm,
• decorative,
• base,

Simple categories matching unnatural:

• variation,
• color,
• drug,
• stimulant,
• cause,
• force,
• disturbance,
• object,
• compound,
• substance,
• event,
• chemical,
• danger,
• substrate,
• food,
• drink,
• surface,
• action,
• condition,
• catastrophe,
• shade,
• death,
• component,