It is easy to understand intuitively that it match the color coding of 2nn.
2nnの色分けと合わせて頂けると直感的に判り易い
http://www.2nn.jp/
｢速＋｣＝紺　Navy blue
｢芸＋｣＝橙　Orange
｢東＋｣＝赤　Red
｢ビ＋｣＝緑　Green
｢国＋｣＝青　Blue
｢科＋｣＝灰　Gray
｢ほ＋｣＝茶　Brown
｢萌＋｣＝桃　Pink
｢痛＋｣＝薄紫　Lilac

以下6種は出現数少量のため全て黒で良いかと
The following six and either may be the all black because of the number of occurrences small amount.
｢二軍｣＝黒　Black
｢実＋｣＝黒　Black
｢SNS｣＝黒　Black
｢ア＋｣＝黒　Black
[社＋]＝黒　Black
｢詫＋｣＝黒　Black