Background Young adults with disabilities often face societal barriers to inclusion and can experience discrimination. They frequently report higher levels of social isolation compared to their peers without disabilities and find it challenging to access social activities. "Colouring the Spectrum" is a program of art and music workshops with goals to promote social inclusion, equity, and connections with peers and the local community for young adults with disabilities. Methods "Colouring the Spectrum" was collaboratively designed and facilitated by a music therapist and an artist with a background in healthcare. The program included young adults (19-36yrs) with various diagnoses, such as Down syndrome, intellectual disabilities, acquired brain injuries, and one participant who is registered blind. The program consisted of eight workshops that combined the creation of abstract art and accompanying music soundtracks. An improvisational and participatory design encouraged young adults to actively contribute, fostering their agency and ownership of the program's creative outcomes. After the program, participants completed a questionnaire or participated in an interview to share their thoughts on how the program benefited them. The creative outputs, including their artworks and music, were exhibited in a local gallery. Results The showcased artworks and musical pieces highlighted the collaboration, skill development, and self-expression of the young adults, while also serving as advocacy tools that demonstrated the potential and creativity of individuals with disabilities. The exhibition was well-attended and received positive attention in the local community highlighting the young adults’ success beyond the workshops. Participants reported feelings of achievement, personal growth, and increased social connections with their peers. Conclusions "Colouring the Spectrum" illustrates how participatory arts programs can support the social determinants of health for young adults with disabilities.