ABSTRACT Introduction: The Rainbow Diet is a colorful intelligent and intuitive system for putting together you’re eating and living in a holistic way that brings you vitality, energy, and peace of mind. The Rainbow Diet is a comprehensive holistic health guide that helps you to understand the physical and energetic properties of foods through their colors. Every food and nutrient have a “color code”—you take a questionnaire, figure out which color you need, and the color syncs with different nutrients. Objectives: The study was conducted assess the knowledge regarding rainbow nutrition among mothers of under five children in a selected Anganwadi, Bengaluru. Methodology: One group pre-test research design was adopted to assess the knowledge of rainbow nutrition among mother’s of under five children. The samples selected through convenient sampling technique. Data collected through structured knowledge questionnaire. Results: With regard to pretest level of knowledge it shows that, maximum 31(62%) respondents were having average knowledge, 10(20%) respondents were having poor knowledge and remaining 9(18%) of respondents were having good knowledge.  Conclusion: The finding revealed that there is a need of nutrition education regarding rainbow among under five children mother’s children.