I often dye items of clothing in the washing machine. Items should be cotton or viscose. You need to check the colour of the original STITCHING. Usually the thread is polyester and doesn't take up colour, so you may have WHITE stitching details, interesting or not... If the stitching is black or dark, no problem. I recently dyed a patterned dress and now it is much more muted - all the pattern is in shades of royal blue. I like it much better.
You could co-ordinate your wardrobe by dyeing it - if it's made of cotton or viscose.