red: #a60a0b (64 thumbnails)

green: #50a11d (64 thumbnails)

blue: #144aac (64 thumbnails)

brown: #7a4b2d (64 thumbnails)

pink: #c66159 (64 thumbnails)

amaranth: #b69d42 (64 thumbnails)

chartreuse: #b5d734 (64 thumbnails)

periwinkle: #4871b9 (64 thumbnails)

winter: #6188c1 (64 thumbnails)

spring: #aab93e (64 thumbnails)

summer: #6bdb3f (64 thumbnails)

autumn: #985c22 (64 thumbnails)

january: #7a79be (64 thumbnails)

february: #c254a2 (64 thumbnails)

march: #93c357 (64 thumbnails)

april: #bd9244 (64 thumbnails)

may: #bd7248 (64 thumbnails)

june: #9db644 (64 thumbnails)

july: #a33344 (64 thumbnails)

august: #a98840 (64 thumbnails)

september: #a7624a (64 thumbnails)

october: #9e4816 (64 thumbnails)

november: #9f5f34 (64 thumbnails)

december: #637eab (64 thumbnails)

monday: #d69366 (64 thumbnails)

tuesday: #cf6368 (64 thumbnails)

wednesday: #c9615d (64 thumbnails)

thursday: #d08572 (64 thumbnails)

friday: #d29b6f (64 thumbnails)

saturday: #c46d57 (64 thumbnails)

sunday: #ce8772 (64 thumbnails)

friendship: #d0896f (64 thumbnails)

hate: #aa674b (64 thumbnails)

indifference: #9f7845 (64 thumbnails)

love: #bd2f45 (64 thumbnails)

nostalgia: #9c7b4c (64 thumbnails)

closed source: #bf886e (64 thumbnails)

open source: #6cc459 (64 thumbnails)

esoteric: #975b40 (64 thumbnails)

NP-complete problem: #c7b76c (64 thumbnails)

bears: #9a9956 (64 thumbnails)

Cthulhu: #3d5e2c (64 thumbnails)

electricity: #2e57a0 (64 thumbnails)

fire: #a63c10 (64 thumbnails)

kittens: #ae916f (64 thumbnails)

magic: #34639b (64 thumbnails)