As the world becomes a more stressful place, there is a growing demand for living and working spaces that provide somewhere to relax, regenerate and replenish ourselves so we can lead more balanced and fulfilled life personally, and as a community.

The Holistic Design Institute (HDI) was founded in 1992 by international best-selling author and leading Holistic Interior Designer and Colour Therapy consultant, Suzy Chiazzari. Since then the Institute has developed an excellent international reputation as a leading learning provider in the fields of creative and therapeutic arts using Colour Psychology and Colour Therapy, Holistic Interior design and Healing Garden design, Transformative Therapy, Music and Sound Therapy and Creative Art as Therapy. Our courses can be used for personal or professional development as well as offering a creative and caring career. Our beautiful Diploma that can be used anywhere in the world is awarded by the Holistic Design Institute UK.

Our home study courses are specially designed for home study by leading colour psychology consultant and holistic interior designer, Suzy Chiazzari who is also an affiliate member of the Royal Institute of British Architects RIBA. Our professional courses and are tutored by Suzy, who shares her experience and offers you sensitive support and comprehensive personal advice during your studies. The vocational home study courses have plenty of practical content so you become confident to work in your field of study when you graduate.


At the Iris School of Colour we are passionate about colour and its ability to enrich and change lives. We are proud to be considered the leading training provider in the specialist field of colour and light as a healing tool to enhance self-development, health and well-being. All our accredited distance learning colour therapy courses were specially designed for home study and are tutored by Suzy Chiazzari herself, who is an internationally renowned bestselling author, teacher and colour therapy expert, who warmly shares her vast knowledge with you and gives you personal guidance and support during your studies. In her work Suzy combines colour therapy with other complementary health practices, including Counselling, Aromatherapy, Reflexology, Life Coaching and Spiritual healing and we offer many professional and short courses in all of these modalities.


World renowned professional training in growing and specialist fields of study.

Long established UKRLP registered and insured school based in the UK.

Beautiful accredited Diploma so you can practice anywhere in the world.

Friendly and supportive tutoring and personal attention by Suzy Chiazzari, our principal.

Flexible start time and study at your own speed.

Choice of study mode by email, CD or lessons in workbooks (last option in UK only)

Easy to follow and comprehensive course lessons with other learning materials.

Simple assessment system.

Free one year practitioner membership to HDI and IWOC to our graduates.

After graduation support and social media forums.

Holistic Design Courses

The Holistic Design institute is a leading UKRLP registered online college that provides specialist training in Interior design, Garden design and Therapeutic Art and Music.

View our Holistic Design courses

Colour Therapy Courses

At the Iris School of Colour Therapy we are passionate about colour. We believe that colour is a natural gift that we can use to enrich ourselves, and to help us through the stresses and challenges of life.

View our Colour Therapy courses

Popular Courses

Transformative Therapy using Art and Music

Transformative Therapy using Art and Music

Art and Music as Therapy Diploma course 10 Lessons If you believe in the power of the creative Arts and Music to transform lives, this…

Advanced accredited Colour Therapy Counsellor Diploma

Advanced accredited Colour Therapy Counsellor Diploma

COLOUR THERAPY COUNSELLOR AND HEALER Diploma - Advanced Level Professional Training for Colour Therapy, accredited by IWOC, IICT and CThA…

Colour Life Coaching Programme (TM)

Colour Life Coaching Programme (TM)

Professional Diploma to qualify as a Certified Colour Life Coach. Course in 10 Lessons Colour Coaching is a sensitive and non-prescriptive approach…


I immensely relished reading, studying, exploring and practising this course at home. It has changed my life completely but most of all it has made me more happy and accepting of myself and others. I feel like a completely different woman. This amazing course has given me great fortitude, self-esteem, self-confidence and a real passion to get up and go out there and achieve my soul purpose.

Thank you so very much.

Energy Medicine Diploma with Colour, Gems, Flowers & Flower Essences