Seems the current crop of Peak coolants follow the older G12 and newer G13 specs. The "pink" is older G12 carboxylate
OAT while the "purple" is the newer glycerol based G13. The main reason BASF changed between the 2 is for environmental safety and cost. Both are organic acid technology (OAT) long life coolants and "can" be mixed, but not recommended if possible (NOT at all like the old G11 and G12 incompatibility). G13s have better corrosion protection and heat dissipation capabilities over the G12s, but are essentially the same, except G13 has added back in a small amount of silicates (Si-OAT) for the more robust corrosion protection.
You can use distilled water for small amounts of top-up, but a lot can dilute the corrosion protection add pack. More manufacturers are offering these vehicle specific formulas over the more expensive OE stuff, especially in the no-mix, ready to use packaging. Even VW/Audi is offering a pre-mixed, RTU G13 for ease of use. Expensive though.
So, did you F something up? No.