I was 100% adamant my oldest was pink/yellow colour blind when she was around 3, but she's 5.5 now and definitely not 😂 they're still really young, so getting colours mixed up is quite normal still. And in all honesty, even if he was, there's not much to be done anyways, so try not worry 😊
Mine keeps calling green, blue and yellow, orange 😆 think it’s just trying to remember the colours
Our daughter really struggles with red and we mentioned to the HV at the two year check in but apparently it’s normal at this age 🤷♀️