What skin coloration is typically observed under a Wood's lamp for normal skin?

Under a Wood's lamp, normal skin typically exhibits a blue coloration. This blue fluorescence occurs due to the presence of certain compounds in the skin that reflect UV light emitted by the lamp. Normal skin, which contains healthy levels of melanin and other elements, will display this blue hue, indicating a lack of any abnormal conditions or infections.

Other colors observed under a Wood's lamp can indicate various skin conditions or issues. For instance, yellow may suggest the presence of oils or certain bacterial infections, green can point to a fungal infection or the presence of certain substances, and red might indicate a vascular issue or certain types of skin lesions. Hence, the blue fluorescence is recognized as a sign of healthy, normal skin.