Let's Talk About Harmony
Harmony is one of the 12 principles of design, it is the sense of wholeness achieved when an artwork is perfectly balanced. Sometimes it's also called Unity.

Harmony involves using multiple principles in a way that successfully achieves a desired outcome.
A harmonious artwork feels complete. "Harmony in a relationship among the elements of a visual helps them function together, thereby giving a sense of oneness to the image. Harmony in visual design means all parts of the visual image relate to and complement each other"(Deepak John Mathew, 2011)

Video by CTRL paint | Principles of Design: Unity

List of references
Deepak John Mathew (2011). _Principles of Design Through Photography_. SCB Distributors.
Loew, I. (2021). _The 13 Principles of Design (And How to Apply Them)_. [online] Paperform Blog. Available at: https://paperform.co/blog/principles-of-design/.
ZEKA DESIGN. (2020). _12 Principles Of Graphic Design_. [online] Available at: https://www.zekagraphic.com/12-principles-of-graphic-design/.
www.youtube.com. (n.d.). _Understanding the Principles of Design_. [online] Available at: https://www.youtube.com/watch?v=65WjYDEzi88&t=387s&ab_channel=JesciaHopper [Accessed 26 Sep. 2023].
www.youtube.com. (n.d.). _Principles of Design: Unity_. [online] Available at: https://www.youtube.com/watch?v=4TWHxTJaYnE&ab_channel=Ctrl%2BPaint [Accessed 26 Sep. 2023].
www.youtube.com. (n.d.). _Art Education - Principles of Design - Unity - Getting Back to the Basics - Art Lesson_. [online] Available at: https://www.youtube.com/watch?v=PyXsnWDmkLY&ab_channel=PaintItKids [Accessed 26 Sep. 2023].
www.youtube.com. (n.d.). _YouTube_. [online] Available at: https://www.youtube.com/embed/4TWHxTJaYnE?si=RLVNb5813t7Aut2T.