A clash I saw at my kid's school event over color coded signs

At my son's science fair, they used red and green stickers to show winning projects (which is a classic problem for colorblind people, right?). I overheard two parents arguing about it; one said the school should always use shapes or words instead of colors to be fair to everyone. The other parent said it's too much hassle for a one-time event and most kids can tell the colors apart anyway. This got me thinking about my own family, where my uncle often misses details on birthday cards because they rely on color cues. So, is it better to push for colorblind-friendly designs in all group settings, even if it means more work, or should we only speak up when it directly affects us? I've seen both sides in my office too, with charts that confuse some teammates. What's your take on handling this with friends or in public places?