血色素

血 = 丶 + 皿 : Mnemonic symbol: blood transfusion.

Xu Xian hurt himself and needs to get a blood transfusion in the elevator's bathroom. He found a petal leaf as donor, which is bleeding droplets into a bowl; Xu Xian gets the blood from the bowl as infusion using some tubes.

色 = ⺈ + 巴 : In the elevator's bathroom, Socrates watches a crane lick a beautiful lollipop. The lollipop features every color existing on earth.

色 = ⺈ + 巴 : In the airplane, Sherlock Holmes watches the crane licking a very tasty lollipop. He wants to have it, so he challenges the crane for it. The crane agrees to give him the lollipop if he can beat him in a dice game.

素 = 龶 + 糸 : Susan Saint Bernard (su) has decided to become a vegan (素) and to let everyone know. In the space station's bathroom (Ø4) she manufactures a fancy headdress (龶) in the form of a vegan flower (素) out of her own spider silk (糸) so that everyone who sees her instantly knows that she's vegan (素).