Take a look at the small dots at the selvage or the print itself, and try to match the colours. Close enough is close enough; if you have trouble matching a colour, it will be less noticeable if you use several fabrics in the same colour range. Group colours like “reds”, or “tans” or “blues” and make sure you have lots of different values and textures. If you have another multicoloured fabric that fit – throw it in the mix. If there is too many – take some away.
Using the kick start fabrics to the right above; I first chose greens
Then oranges and yellows
There is a lot of white background in the fabric, so I added a few fabrics with white
Here is the whole range
And some more examples