Building a DIY light for reef aquarium, looking for advice

I have a 90 gallon reef tank and wanted to do a DIY LED setup for it. I am not sure exactly where to start, since the spectrum is so blue. I wad thinking just 10,000k white LEDs, but the decent LEDs only go up to 5000k-6000k so I would need to add some blue diodes, but I have no idea which ones to use

Thanks