In idol groups such as the Hello! Project ones, members are assigned a colour in their group. That makes them easily recognizable, and is useful for merchandising and for example for wotas with their king blades.
There's been a time, during the Mobekimasu era, when groups were given a colour. If we were to do the same today, which colours would you give to the H!P groups? That may not be just a imagination exercise, for example, that may help distinguishing groups in H!P concerts (although discussing the relevance of such a thing isn't the main subject of this topic in my view). You can either describe the colours, or change the font colour accordingly.
In fact, this topic has another goal. If we want to make rankings, pollings or lists of members (for example, the 2016 H!O general election), we have to give groups colours, and because there isn't anything standardized in that matter, anyone can come up with any colouring, which doesn't make things very clear when several people use different colour codes. Thus the topic is also here to find a standardized way to give colours to groups.
So I'll begin with mine:
Morning Musume。 I don't really like the "red=ace" thing, but I think I unconciously applied this to groups. Since MM is the flagship group, yeah, red. Fits the Mobekimasu colour.
°C-ute Well, cute->pink, don't know, makes sense. Fits the Mobekimasu colour.
ANGERME <- that should be white, but we wouldn't see anything. A sense of freshness, purity, and also inspired by their logo. Fits the Mobekimasu colour of S/mileage at the time.
Juice=Juice Yeah, when I think juice, I think orange juice, thus orange...
Country Girls Country -> green. But I don't like greens that are too flashy. So a flashy green nonetheless, but not that flashy.
Kobushi Factory A lighter blue than Berryz Koubou's one with Mobekimasu. They are the "successors" after all, but I thought a darker blue wouldn't suit them that well, because they're still young and energetic.
Tsubaki Factory Besides being a colour I didn't already give to other groups, I'd see them as maybe a more refined group, and besides that, I can't really give any explanation other than "violet fits them well".
Hello! Pro Kenshuusei <- yeah I know a yellow font really hurts, sorry. The two arguments I have would be: that's a colour I didn't give to any group yet, and that's the colour of their famous T-shirts.
Hello! Pro Kenshuusei Hokkaidou A lighter yellow because I think we should separate KSS from Hokkaidou KSS in the colouring, and I took the standard yellow KSS colour and added a bit of white because well, Hokkaidou -> snow -> white.
Finally, I can't find any colour for Buono!, maybe something like black since they were supposed to be more rock. However, I don't think we'll hear anything from the group anymore, so I'll leave it as it is.
You can see that I've given the three (traditional) primary colours and the three secondary ones, plus pink. Because... idols, obviously. I think that makes them clearer and gives them identities.
v good idea