Ok, so checking the manual for that board shows that they are all four pin fan headers. It only shows that there are three system fan headers though. There are additional fan headers but those are for the CPU and watercooling. You will likely need to get a fan splitter cable to run two of the four fans off one of the system fan headers. It will need to be a four pin fan splitter cable.
I'd recommend these fans based on the budget and their performance. Certainly there are a ton of other less expensive options, but these should offer you good performance and reliability and are in my opinion some of the best fans money can buy. If the color is a problem, then Noctua does make a Chromax version of these same fans in black, but they seem to be WAY more in price compared to these, in your market at least. You can likely check some other sources for them as well though.
PCPartPicker part list /
Price breakdown by merchant
Case Fan: Noctua - NF-F12 PWM 55.0 CFM 120mm Fan (€19.79 @ Aquatuning)
Case Fan: Noctua - NF-A14 PWM 82.5 CFM 140mm Fan (€21.79 @ Aquatuning)
Case Fan: Noctua - NF-A14 PWM 82.5 CFM 140mm Fan (€21.79 @ Aquatuning)
Case Fan: Noctua - NF-A14 PWM 82.5 CFM 140mm Fan (€21.79 @ Aquatuning)
Total: €85.16
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2018-01-29 16:53 CET+0100
If you want to find a less expensive or different option then I'd look to fans sold by Noctua, Thermalright (NOT Thermaltake), Noiseblocker, Corsair (Maglev), Cryorig, Phankteks, Scythe or Cougar. Of course, not ALL fans by those brands are great. Much like power supplies or anything else, you have to go on a model by model basis. They all have good and not so good models. Noctua is, in my opinion, far and away the best choice for case and heatsink fans, bar none.