In recent years, Korea has been continuously showing the need for a healing environment, along with public interest in "well-being," "wellness" and "well-fare" due to the industrialization and advancement of social structure. Reflecting public demand, there are various efforts of the Korean government to improve the public health environment and services, and it is believed that it is time to make efforts to improve these qualities. This study is part of the development of 'Healthcare Environmental Color Index' that is applicable to public healthcare facilities and has health promotion as healing functions, and was conducted by a web-based online survey verification assessment on colors developed as ‘Healthcare environmental color index based on color theory'. This study suggests a method of verification research to collect continuous research data on environmental color index while promoting the social spread of health and environmental color index through the web-site. 155 young people aged 20 to 35 who visited the web-site(www.healthcarecolor.or.kr) from November 28, 2018 to January 28, 2019, participated in the survey and analyzed 133 responses except for missing data. As a result, respondents were found to be highly aware of the relationship between environmental color and health promotion and have the will to improve health through environmental color in their spaces. Among the environmental color index, the most therapeutic effect was the color of the G colors, which was found to be consistent with the results of the preceding study. Respondents recognized that the higher the intensity and saturation of the R and Y colors, the more effective the provision of energy vitality and bright energy, and the better the G and B colors for calming, moderate, and light tones for fatigue relief.