Ring Bearer Outfits

So I will be having 2 ring bearers (one in 2nd grade and another is a toddler). I'm having trouble figuring out what I want them to wear. My fiance will be in a darker grey suit, groomsmen will be in light grey suits. The older ring bearer we had picked out a little mini suit that looks like the groomsmen (our older flower girl has a dress that looks similar to my bridesmaids in navy). So my question is, should I have the toddler wear something similar to the other ring bearer, or should I put him in something navy, or even something closer to what my fiance is wearing? Any input would be greatly appreciated!