To wash away the sadness of the mountain's color, engaging in nature-based activities such as hiking, spending time in green spaces, or even simply looking at nature imagery can be effective. According to research published in the Journal of Environmental Psychology, exposure to natural environments can reduce negative emotions and improve mood. This is due to the calming and grounding effects of nature, which can help individuals disconnect from stressors and focus on the present moment.

Nature-based activities stimulate the release of endorphins, the body's natural mood lifters, and can also provide a sense of awe and wonder that can counteract feelings of sadness. For example, a study by the University of Exeter found that spending time in nature can lead to a decrease in cortisol levels, the stress hormone, and an increase in positive emotions. Additionally, the act of engaging with nature can provide a sense of control and accomplishment, which can be particularly beneficial for individuals dealing with sadness or depression.

Furthermore, the act of hiking or walking in nature can serve as a form of mindfulness, allowing individuals to focus on their surroundings and the experience of movement, which can help shift their attention away from negative thoughts. This mindfulness practice is supported by research from the University of Rochester, which suggests that mindfulness can reduce rumination, a common symptom of sadness and depression.

In conclusion, to wash away the sadness of the mountain's color, embracing nature can be a powerful tool for emotion regulation. The calming effects of nature, combined with the release of mood-enhancing chemicals and the practice of mindfulness, can provide a holistic approach to managing sadness and improving overall well-being.