I have my h100i pump set to White.. because it's default and I don't have the software installed to change it.
Then my gtx 1080 is on rainbow because it's default. Doesn't bother me though. People think it's cool and I never look at it since it's out of my field of view
Corsairs ML Pro fans are actually pretty damn good and well worth the £20 for the non LED version or £25 price tag for the blue LED, Red LED or white LED version, These RGB fans however have bad performance and cheap and nasty looking frames, To add insult to injury Corsair expect people to pay £40 for each one of them, It's greed gone to whole new levels.
Well the stats are kinda crap so I will compare them ^_^
These fans would be good for a system that doesn't need much in the way of cooling but for anyone that actually wants airflow these are subpar and 1 for the RGB loving kids.
How do you know that? There are fans with similar specifications that perform admirably. It's the prices I'm concerned about. Corsair are seemingly banking on their idolising fans (sorry, pun not intended) who have to have everything Nvidia/Intel/Corsair/ASUS.