Distinguishing between oily, dry, combination, and sensitive skin to select appropriate product formulations (e.g., silicone-based vs. water-based).
Understanding color temperature. Artificial "warm" light can make makeup look yellow, while "cool" fluorescent light can wash out colors, requiring more saturation. makeup theory pdf
Using opposites on the wheel to create "pop." For example, gold and copper tones (containing yellow/orange) make blue eyes appear more vibrant. Distinguishing between oily
Highlighting uses light shades to "bring forward" features (like the tops of cheekbones), while contouring uses cool-toned shadows to "push back" or recede areas (like the hollows of the cheeks or the jawline). makeup theory pdf
No amount of technical skill can compensate for a poor canvas. Makeup theory emphasizes the biological aspects of the skin.