Coleus are a wonderful plant to grow in a partial shade location.
They are a wonderful companion plant to any other part shade loving perennials, annuals or shrubs.
Here are some links to help you.
After doing some research on plant varieties and care requirements it's very helpful to visit local garden centers to visualize mixing different plants together.
Have fun with this planting project!
Could you give more information on where the bed is located? How much sunlight does the spot get? Are there already other plants in the bed? Is it a raised bed? What kind soil does the bed have. Coleus usually looks best in shade and partial shade locations. I usually plant it in a shade and partial shade location with caladiums, impatiens, astilbes, hostas, heucheras, and autumn ferns.