You can fly a $229 discovery flight with no medical certificate at all. You take the controls, the hour is loggable dual instruction, and if you enroll within 24 hours the full price is credited against your program. Nobody asks about your color vision to book it. If you want to find out whether you even like this before you deal with the FAA, that is the order to do it in.
Sport Pilot at $8,400 requires no medical certificate either. A valid US driver’s license is the alternative, provided no FAA medical has previously been denied, suspended or revoked — that proviso matters, and it is the reason we tell people not to apply for a medical they are not ready for. Sport Pilot has real limits: one passenger, no flying for compensation, aircraft that meet the performance limits in 14 CFR 61.316, and night only with the 14 CFR 61.329 training, endorsement and a part 67 medical or BasicMed. For some readers of this page those limits overlap almost exactly with what a #104 limitation would impose anyway.
If the goal is a private pilot certificate or a career, book the free consultation. Bring whatever test result you already have. We will tell you honestly where you stand and where you need an AME rather than us, and we will not sell you a program you might not be able to finish.