Love Live! Literal Image Colors According to the Website Linked at the Very End of This Post
Honoka - Zest
Kotori - Oslo Gray
Umi - Fun Blue
Rin - Ripe Lemon
Hanayo - Apple
Maki - Brick Red
Nico - Cranberry
Nozomi - Affair
Eli - Scooter
Tsubasa - Twine
Erena - Vivid Violet
Anju - Hot Cinnamon
Chika - Buttercup
You - Picton Blue
Riko - Light Orchid
Hanamaru - Barberry
Ruby - Blush Pink
Yoshiko - Gray
Mari - Medium Purple
Kanan - Bright Turquoise
Dia - Amaranth
Sarah - Affair
Leah - Strikemaster
Ayumu - Mauvelous
Ai - Jaffa
Setsuna - Mandy
Kasumi - Broom
Rina - Gray Chateau
Shizuku - Malibu
Emma - Atlantis
Kanata - Tapestry
Karin - Scampi
Website: Here
The color codes are based on the ones on this website.