How many colors can be incorporated into the design?

I’m open to whatever you feel. After I see it then I will give feedback but I don’t have anything in mind.

What is the colour of T-shirt and can we use gradient colour or you want flat cokours>

I’d like it to work on many colors. The more the better

My question was what is the coulour of T- shri? sp that we can justify on colours.
Thanks

It wouldn’t be one color t shirt. Like I said, it would need to work on multiple colors. Black, white, grey, purple, red, etc...