All male bridal party and groomsman attire

I've seen mixed parties, where the groomsman on the ladies side is wearing a suit of the same colour as the bridesmaids, and I thought it looked really cool:

I know you have all men, but could you have them in totally different coloured suits, just to show they're from 'your' side?

I would probably make it simple and do different colored ties and then different boutonnieres.

We had no bridesmaids and three groomsmen so our entire wedding party was male. We didn't do a bunch of wedding party photos though, largely because of the discrepancy. The groomsmen all wore the exact same suit, shirt, and tie as my husband but my husband had a 3-piece suit, while the groomsmen had 2-piece suits, and my husband's boutonniere was different.

My husband was the best man in a wedding that had a bridesman of honor. All of the men wore the same tuxes, but the bride's male attendants wore a different color bowtie and pocket square to distinguish them from the groomsmen. The colors were black, burgundy, and white, so one side had white ties and pocket squares and the other side had burgundy. The bride was in white and the tuxes were black.

I think similar colored suits with different colored accessories/accents will be enough to distinguish between the sides. If you want a bigger splash of color than just ties, pocket squares, and boutonnieres, consider having the guys wear a three piece suit with different colored vests.