09/28/2026
Bathroom faucets with LED light indicators change colors based on water temperature to visually signal how hot or cold the stream is.
Blue: Cold water (usually below 86°F / 30°C)
Green: Warm or comfortable water (86°F to 104°F / 30°C to 40°C)
Red: Hot water (above 104°F / 40°C).
This color-changing feature can increase safety and possibly prevent accidental burns from hot water, especially helpful if you have small children.